Philips UM10109 11.6 I2C operation modes

© Koninklijke Philips Electronics N.V. 2005. All rights reserved.

User manual Rev. 02 — 23 May 2005 73 of 133

Philips Semiconductors UM10109

P89LPC932A1 User manual

The values for I2SCLL and I2SCLH do not have to be the same; the user can give different

duty cycles for SCL by setting these two registers. However, the value of the register must

ensure that the data rate is in the I2C data rate range of 0 to 400kHz. Thus the values of

I2SCLL and I2SCLH have some restrictions and values for both registers greater than

three PCLKs are recommended.

11.6 I2C operation modes

11.6.1 Master Transmitter mode

In this mode data is transmitted from master to slave. Before the Master Transmitter mode

can be entered, I2CON must be initialized as follows:

CRSEL defines the bit rate. I2EN must be set to 1 to enable the I2C function. If the AA bit

is 0, it will not acknowledge its own slave address or the general call address in the event

of another device becoming master of the bus and it can not enter slave mode. STA, STO,

and SI bits must be cleared to 0.

Table 65: I2C clock rates selection

Bit data rate (Kbit/sec) at fosc

I2SCLL+

I2SCLH

CRSEL 7.373 MHz 3.6865 MHz 1.8433 MHz 12 MHz 6 MHz

6 0 - 307 154 - -

7 0 - 263 132 - -

8 0 - 230 115 - 375

9 0 - 205 102 - 333

10 0 369 184 92 - 300

15 0 246 123 61 400 200

25 0 147 74 37 240 120

30 0 123 61 31 200 100

50 0 74 37 18 120 60

60 0 61 31 15 100 50

100 0 37 18 9 60 30

150 0 25 12 6 40 20

200 0 18 9 5 30 15

- 1 3.6 Kbps to

922 Kbps

Timer 1 in

mode2

1.8 Kbps to

461 Kbps

Timer 1 in

mode 2

0.9 Kbps to

230 Kbps

Timer 1 in

mode2

5.86 Kbps to

1500 Kbps

Timer 1 in

mode 2

2.93 Kbps to

750 Kbps

Timer 1 in

mode2

Table 66: I2C Control register (I2CON - address D8h)

Bit 7 6 5 4 3 2 1 0

- I2EN STA STO SI AA - CRSEL

value-1000x- bit rate

Contents

Main Contact information 1. Introduction 1.1 Comparison to the P89LPC932 device 1.1.1 Byte-erasability (IAP-Lite) 1.1.2 Serial in-circuit programming (ICP) 1.1.3 On-the-fly clock selection 1.1.4 Increased ISP/IAP functionality User manual Rev. 02 23 May 2005 5 of 133 1.1.5 Previous errata fix Fig 1. P89LPC932A1 TSSOP28 pin configuration. 1.2 Pin configuration P89LPC932A1FDH Fig 2. P89LPC932A1 PLCC28 pin configuration. Fig 3. P89LPC932A1 HVQFN28 pin configuration. P89LPC932A1FA P89LPC932A1FHN 1.3 Pin description P89LPC932A1 User manual Philips Semiconductors UM10109 P89LPC932A1 User manual Philips Semiconductors UM10109 Page Fig 4. P89LPC932A1 block diagram. P89LPC932A1 Page Page Page Page Page Page Page User manual Rev. 02 23 May 2005 20 of 133 1.5 Memory organization Fig 5. P89LPC932A1 memory map. 2. Clocks 2.1 Enhanced CPU 2.2 Clock definitions 2.2.1 Oscillator Clock (OSCCLK) 2.2.2 Low speed oscillator option 2.4 On-chip RC oscillator option 2.5 Watchdog oscillator option 2.6 External clock input option User manual Rev. 02 23 May 2005 23 of 133 2.7 Oscillator Clock (OSCCLK) wake-up delay Fig 7. Block diagram of oscillator control. Fig 6. Using the crystal oscillator. 2.8 CPU Clock (CCLK) modification: DIVM register 2.9 Low power select 3. Interrupts 3.1 Interrupt priority structure 3.2 External Interrupt pin glitch suppression Page 4. I/O ports 4.1 Port configurations 4.2 Quasi-bidirectional output configuration 4.3 Open drain output configuration 4.4 Input-only configuration 4.5 Push-pull output configuration 4.6 Port 0 and Analog Comparator functions 4.7 Additional port features 5. Power monitoring functions 5.1 Brownout detection 5.2 Power-on detection 5.3 Power reduction modes 6. Reset set. 6.1 Reset vector 7. Timers 0 and 1 7.1 Mode 0 Page Page 7.6 Timer overflow toggle output Fig 16. Timer/counter 0 or 1 in Mode 2 (8-bit auto-reload). Fig 18. Timer/counter 0 or 1 in mode 6 (PWM auto-reload). Fig 17. Timer/counter 0 Mode 3 (two 8-bit counters). 8. Real-time clock system timer 8.1 Real-time clock source 8.2 Changing RTCS1/RTCS0 8.3 Real-time clock interrupt/wake-up 8.4 Reset sources affecting the Real-time clock Page 9. Capture/Compare Unit (CCU) 9.1 CCU Clock (CCUCLK) 9.2 CCU Clock prescaling 9.3 Basic timer operation Page 9.4 Output compare Page 9.5 Input capture 9.6 PWM operation 9.7 Alternating output mode 9.8 Synchronized PWM register update 9.9 HALT 9.10 PLL operation Page Fig 24. Capture/compare unit interrupts. Page 10. UART 10.1 Mode 0 10.2 Mode 1 10.3 Mode 2 10.4 Mode 3 10.5 SFR space 10.6 Baud Rate generator and selection 10.7 Updating the BRGR1 and BRGR0 SFRs 10.8 Framing error 10.9 Break detect 10.10 More about UART Mode 0 10.11 More about UART Mode 1 10.12 More about UART Modes 2 and 3 Fig 27. Serial Port Mode 1 (only single transmit buffering case is shown). Fig 28. Serial Port Mode 2 or 3 (only single transmit buffering case is shown). If SM2 = 1 in modes 2 and 3, RI and FE behaves as in the following table. 10.13 Framing error and RI in Modes 2 and 3 with SM2 = 1 10.14 Break detect 10.15 Double buffering 10.16 Double buffering in different modes 10.17 Transmit interrupts with double buffering enabled (Modes 1, 2, and 3) 10.18 The 9th bit (bit 8) in double buffering (Modes 1, 2, and 3) 10.19 Multiprocessor communications 10.20 Automatic address recognition 11. I2C interface 11.1 I2C data register 11.2 I2C slave address register 11.3 I2C control register 11.4 I2C Status register 11.5 I2C SCL duty cycle registers I2SCLH and I2SCLL 11.6 I2C operation modes 11.6.1 Master Transmitter mode 11.6.2 Master Receiver mode 11.6.3 Slave Receiver mode 11.6.4 Slave Transmitter mode Fig 36. I2C serial interface block diagram. Page Page Page Page Page 12. Serial Peripheral Interface (SPI) Page Page Fig 39. SPI dual device configuration, where either can be a master or a slave. Fig 38. SPI single master single slave configuration. 12.1 Configuring the SPI 12.2 Additional considerations for a slave 12.3 Additional considerations for a master 12.4 Mode change on SS 12.5 Write collision 12.6 Data mode Fig 41. SPI slave transfer format with CPHA = 0. Fig 42. SPI slave transfer format with CPHA = 1. Fig 43. SPI master transfer format with CPHA = 0. 12.7 SPI clock prescaler select 13. Analog comparators 13.1 Comparator configuration Page 13.2 Internal reference voltage 13.3 Comparator input pins 13.4 Comparator interrupt 13.5 Comparators and power reduction modes 13.6 Comparators configuration example 14. Keypad interrupt (KBI) 15. Watchdog timer (WDT) 15.1 Watchdog function 15.2 Feed sequence Page Philips Semiconductors UM10109 The maximum number of tclks is: (3) Tabl e 89 shows sample P89LPC932A1 timeout values. tclks 2 ()255 1+()1 1048577=+= 15.3 Watchdog clock source 15.4 Watchdog Timer in Timer mode 15.5 Power-down operation 15.6 Periodic wake-up from power-down without an external oscillator 16. Additional features 16.1 Software reset 16.2 Dual Data Pointers 17. Data EEPROM 17.1 Data EEPROM read 17.2 Data EEPROM write 17.3 Hardware reset 17.4 Multiple writes to the DEEDAT register 17.5 Sequences of writes to DEECON and DEEDAT registers 17.6 Data EEPROM Row Fill 18. Flash memory 18.1 General description 18.2 Features Page Page Page 18.5 In-circuit programming (ICP) 18.6 ISP and IAP capabilities of the P89LPC932A1 18.7 Boot ROM 18.8 Power on reset code execution 18.9 Hardware activation of Boot Loader 18.10 In-system programming (ISP) 18.11 Using the In-system programming (ISP) Page Page 18.12 In-application programming (IAP) (This feature was not present in the original P89LPC932). 18.13 IAP authorization key 18.14 Flash write enable 18.15 Configuration byte protection 18.16 IAP error status Page Page 18.17 User configuration bytes 18.18 User security bytes This device has three security bits associated with each of its eight sectors, as shown in Table103 18.19 Boot Vector register 18.20 Boot status register Page 19. Instruction set Page Page Page 20. Disclaimers 21. Trademarks continued >> 22. Contents