CPU Clock During Sleep Mode, LPOSC Trim | Cypress CY7C602xx guide

12.2.6 LPOSC Trim

CY7C601xx, CY7C602xx

12.2.6 LPOSC Trim

Table 12-8. LPOSC Trim (LPOSCTR) [0x36] [R/W]

Bit #	7	6	5	4	3	2	1	0
Field	32 kHz Low	Reserved	32 kHz Bias Trim [1:0]			32 kHz Freq Trim [3:0]
	Power
Read/Write	R/W	–	R/W	R/W	R/W	R/W	R/W	R/W
Default	0	–	D	D	D	D	D	D

This register is used to calibrate the 32 kHz low speed oscillator. The reset value is undefined but during boot the SROM writes a calibration value that is determined during manufacturing test. This is the meaning of ‘D’ in the Default field. The trim value is adjusted vs. voltage as noted in Table 12-2.

Bit 7: 32 kHz Low Power

0 = The 32 kHz low speed oscillator operates in normal mode.

1 = The 32 kHz low speed oscillator operates in a low power mode. The oscillator continues to function normally but with reduced accuracy.

Bit 6: Reserved

Bit [5:4]: 32 kHz Bias Trim [1:0]

These bits control the bias current of the low power oscillator.

0 0 = Mid bias

0 1 = High bias

1 0 = Reserved

1 1 = Reserved

Note Do not program the 32 kHz Bias Trim [1:0] field with the reserved 10b value as the oscillator does not oscillate at all corner conditions with this setting.

Bit [3:0]: 32 kHz Freq Trim [3:0]

These bits are used to trim the frequency of the low power oscillator.

12.3 CPU Clock During Sleep Mode

When the CPU enters sleep mode the CPUCLK Select (Bit 0, Table 12-2) is forced to the internal oscillator, and the oscillator is stopped. When the CPU comes out of sleep mode it runs on the internal oscillator. The internal oscillator recovery time is three clock cycles of the internal 32 kHz low power oscillator.

If the system requires the CPU to run off the external clock after waking from sleep mode, firmware needs to switch the clock source for the CPU. If the external clock source is the external oscillator and the oscillator is disabled, firmware needs to enable the external oscillator, wait for it to stabilize, and then change the clock source.

Document 38-16016 Rev. *E

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Cypress manual CPU Clock During Sleep Mode, 8. LPOSC Trim LPOSCTR 0x36 R/W, CY7C601xx, CY7C602xx

Contents

2. Logic Block Diagram 1. FeaturesCY7C601xx, CY7C602xx Cypress Semiconductor Corporation 5. Conventions 3. Applications4. Introduction 6. Pinouts Figure 6-1. Package Configurations Top ViewCY7C60223 24-Pin PDIP 6.1 Pin Assignments CY7C601xx, CY7C602xxTable 6-1. Pin Assignments Name Table 6-1. Pin Assignments continued 7. Register Summary DefaultTable 7-1. enCoRe II LV Register Summary Addr Table 7-1. enCoRe II LV Register Summary continued 9. CPU Registers 8. CPU Architecture9.1 Flags Register Table 8-1. CPU Registers and Register Name Table 9-2. CPU Accumulator Register CPUA 9.1.1 Accumulator Register9.1.2 Index Register Table 9-3. CPU X Register CPUX 9.2.1 Source Immediate 9.2 Addressing ModesTable 9-7. Source Immediate Opcode Table 9-11. Destination Indexed 9.2.5 Destination IndexedExample 9.2.6 Destination Direct Source Immediate 9.2.9 Source Indirect Post Increment 10. Instruction Set SummaryTable 9-15. Source Indirect Post Increment 9.2.10 Destination Indirect Post Increment Cycles 11.1 Flash Program Memory Organization 11. Memory OrganizationFigure 11-1. Program Memory Space with Interrupt Vector Table 0x1FFF 11.3 Flash 11.2 Data Memory Organization11.4 SROM Figure 11-2. Data Memory Organization 11.5 SROM Function Descriptions 11.5.1 SWBootReset FunctionTable 11-2. SROM Function Parameters Variable Name 11.5.3 WriteBlock Function SettingsTable 11-5. WriteBlock Parameters 11.5.4 EraseBlock Function 11.5.6 EraseAll Function Table 11-8. ProtectBlock Parameters11.5.7 TableRead Function Table 11-10. Table Read Parameters Page 19 of 11.6 SROM Table Read Description eg ti 12. Clocking Table 12-1. Oscillator Trim Values vs. Voltage Settings12.1 Trim Values for the IOSCTR Register Gain value for the register at location 0x38 3.3V = 12.2.1 CPU Clock 12.2 Clock Architecture Description Table 12-2. CPU Clock Configuration CPUCLKCR 0x30 R/W Figure 12-1. CPU Clock Block DiagramBit 71 Reserved Table 12-3. OSC Control 0 OSCCR0 0x1E0 R/W Sleep Timer Clock Sleep TimerCPU when Internal Table 12-3. OSC Control 0 OSCCR0 0x1E0 R/W continued Bit 75 Reserved Table 12-4. Clock IO Configuration CLKIOCR 0x32 R/W12.2.2 Interval Timer Clock ITMRCLK Figure 12-3. Timer Capture Block Diagram Figure 12-2. Programmable Interval Timer Block Diagram12.2.3 Timer Capture Clock TCAPCLK Page 27 of Table 12-5. Timer Clock Configuration TMRCLKCR 0x31 R/W 12.2.4 Internal Clock Trim XGM SettingTable 12-6. IOSC Trim IOSCTR 0x34 R/W Bit 40 Gain Table 12-8. LPOSC Trim LPOSCTR 0x36 R/W 12.3 CPU Clock During Sleep Mode12.2.6 LPOSC Trim Table 13-1. System Status and Control Register CPUSCR 0xFF R/W 13. ResetBit 7 GIES Bit 5 WDRS 13.2 Watchdog Timer Reset 13.1 Power On ResetTable 13-2. Reset Watchdog Timer RESWDT 0xE3 W 14. Sleep Mode 14.1 Sleep Sequence 14.1.1 Low Power in Sleep ModeCPUCLK IOW SLEEP BRQ BRA PD Figure 14-1. Sleep Timing Figure 14-2. Wakeup Timing 14.2 Wakeup Sequence Table 15-1. Low Voltage Control Register LVDCR 0x1E3 R/W 15. Low Voltage Detect ControlBit 76 Reserved Bit 54 PORLEV10 Bit 20 VM20 15.2 ECO Trim Register 15.1 POR Compare StateTable 15-2. Voltage Monitor Comparators Register VLTCMP 0x1E4 R Bit 72 Reserved Bit 1 LVD 16.1 Port Data Registers 16. General Purpose IO Ports16.1.1 P0 Data Table 16-1. P0 Data Register P0DATA0x00 R/W 16.2.1 Int Enable 16.2 GPIO Port Configuration16.1.3 P2 Data Table 16-3. P2 Data Register P2DATA 0x02 R/W 16.2.6 Pull Up Enable 16.2.7 Output EnableFigure 16-1. GPIO Block Diagram 16.2.9 P0.0/CLKIN Configuration 16.2.11 P0.2/INT0-P0.4/INT2 Configuration 16.2.10 P0.1/CLKOUT ConfigurationTable 16-7. P0.1/CLKOUT Configuration P01CR 0x06 R/W 16.2.13 P0.7 Configuration 16.2.12 P0.5/TIO0-P0.6/TIO1 ConfigurationTable 16-10. P0.7 Configuration P07CR 0x0C R/W 16.2.14 P1.0 Configuration Table 16-12. P1.1 Configuration P11CR 0x0E R/W 16.2.15 P1.1 Configuration16.2.16 P1.2 Configuration Table 16-13. P1.2 Configuration P12CR 0x0F R/W Table 16-15. P1.4-P1.6 Configuration P14CR-P16CR 0x11-0x13 R/W 16.2.18 P1.4-P1.6 Configuration SCLK, SMOSI, SMISO16.2.19 P1.7 Configuration Table 16-16. P1.7 Configuration P17CR 0x14 R/W Table 16-18. P3 Configuration P3CR 0x16 R/W 16.2.21 P3 Configuration16.2.22 P4 Configuration Table 16-19. P4 Configuration P4CR 0x17 R/W 17. Serial Peripheral Interface SPI Figure 17-1. SPI Block Diagram Table 17-2. SPI Configure Register SPICR 0x3D R/W 17.2 SPI Configure Register17.1 SPI Data Register Table 17-1. SPI Data Register SPIDATA 0x3C R/W Diagram Table 17-3. SPI Mode Timing vs. LSB First, CPOL, and CPHACPHA CPOL 17.3 SPI Interface Pins 18. Timer RegistersFigure 18-1. 16-Bit Free Running Counter Block Diagram Table 18-1. Free Running Timer Low Order Byte FRTMRL 0x20 R/W Figure 18-2. Time Capture Block Diagram Table 18-2. Free Running Timer High Order Byte FRTMRH 0x21 R/WTable 18-3. Timer Configuration TMRCR 0x2A R/W 18.1.2 Time Capture Table 18-5. Timer Capture 0 Rising TCAP0R 0x22 R/W Table 18-4. Capture Interrupt Enable TCAPINTE 0x2B R/WTable 18-6. Timer Capture 1 Rising TCAP1R 0x23 R/W Table 18-7. Timer Capture 0 Falling TCAP0F 0x24 R/W 18.1.3 Programmable Interval Timer Table 18-8. Timer Capture 1 Falling TCAP1F 0x25 R/WTable 18-10. Programmable Interval Timer Low PITMRL 0x26 R Table 18-9. Capture Interrupt Status TCAPINTS 0x2C R/W Table 18-13. Programmable Interval Reload High PIRH 0x29 R/W Table 18-11. Programmable Interval Timer High PITMRH 0x27 RTable 18-12. Programmable Interval Reload Low PIRL 0x28 R/W Page 52 of Figure 18-3. Timer Functional Sequence Diagram Figure 18-5. Memory Mapped Registers Read and Write Timing Diagram Figure 18-4. 16-Bit Free Running Counter Loading Timing Diagram 19. Interrupt Controller Figure 19-1. Interrupt Controller Block Diagram19.1 Architectural Description Table 19-1. Interrupt Priorities, Address, and Name 19.3 Interrupt Latency 19.2 Interrupt Processing19.4 Interrupt Registers Table 19-2. Interrupt Clear 0 INTCLR0 0xDA R/W Interrupt Clear 2 INTCLR2 0xDC R/W Table 19-3. Interrupt Clear 1 INTCLR1 0xDB R/W19.4.2 Interrupt Mask Registers Table 19-5. Interrupt Mask 3 INTMSK3 0xDE R/W Page 57 of Table 19-6. Interrupt Mask 2 INTMSK2 0xDF R/WTable 19-7. Interrupt Mask 1 INTMSK1 0xE1 R/W Table 19-9. Interrupt Vector Clear Register INTVC 0xE2 R/W Table 19-8. Interrupt Mask 0 INTMSK0 0xE0 R/W19.4.3 Interrupt Vector Clear Register 20. Absolute Maximum Ratings 20.1 DC CharacteristicsParameter Conditions Clock 20.2 AC CharacteristicsSPI Timing Figure 20-1. Clock Timing SCK CPOL=0 Figure 20-2. GPIO Timing DiagramSCK CPOL=1 MOSI MISO MISO MOSISS SCK CPOL=0 SCK CPOL=1 MOSI MISO MSB 22. Package Handling 21. Ordering InformationSCK CPOL=0 SCK CPOL=1 MOSI MSB Figure 23-1. 24-Pin 300-Mil SOIC S13 23. Package DiagramsFigure 23-2. 24-Pin 300-Mil PDIP P13 3. DIMENSIONS IN INCHES Page 65 of Figure 23-3. 24-Pin QSOP O241Figure 23-4. 28-Pin 5.3 mm Shrunk Small Outline Package O28 Page 66 of Figure 23-5. 40-Pin 600-Mil Molded DIP P17Figure 23-6. 48-Pin Shrunk Small Outline Package O48 Document Number 24. Document History PageOrig. of Submission PSoC Solutions Sales, Solutions, and Legal InformationWorldwide Sales and Design Support Products