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IBM EM78P447N manual Programmable free running watchdog timer

Models: EM78P447N

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EM78P447N

8-Bit Microcontroller with OTP ROM

Programmable free running watchdog timer

10programmable pull-high pins

2programmable open-drain pins

2programmable R-option pins

Package types:
•	20 pin DIP 300mil	:EM78P447NDP
•	20 pin SOP 300mil	:EM78P447NDM
• 24 pin Skinny DIP 300mil		:EM78P447NCK
• 24 pin SOP 300mil		:EM78P447NCM
• 28 pin DIP 600mil		:EM78P447NAP
• 28 pin SOP 300mil		:EM78P447NAM
• 28 pin SSOP 209mil		:EM78P447NAS
• 32 pin DIP 600mil		:EM78P447NBP
• 32 pin SOP 450mil		:EM78P447NBWM

99.9% single instruction cycle commands

The transient point of system frequency between HXT and LXT is around 400KHz

2 •	Product Specification (V1.1) 03.30.2005

(This specification is subject to change without further notice)

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IBM EM78P447N manual Programmable free running watchdog timer

Contents

8-Bit Microcontroller with OTP ROM Product SpecificationEM78P447N ELAN MICROELECTRONICS CORPAll Rights Reserved Trademark AcknowledgmentsCopyright 2005 by ELAN Microelectronics Corporation ELAN MICROELECTRONICS CORPORATIONContents FEATURESDC Electrical Characteristic Specification Revision HistoryDC ELECTRICAL CHARACTERISTICS AC Electrical Characteristic2 FEATURES 1 GENERAL DESCRIPTIONEM78P447N Programmable free running watchdog timer EM78P447NEM78P447N 3 PIN ASSIGNMENTThis specification is subject to change without further notice Fig. 1 Pin AssignmentEM78P447N Table 1 EM78P447NAP and EM78P447NAM Pin DescriptionTable 2 EM78P447NAS Pin Description EM78P447N Table 3 EM78P447NBP and EM78P447NBWM Pin DescriptionTable 4 EM78P447NCK and EN78P447NCM Pin Description EM78P447N 4 FUNCTION DESCRIPTIONFig. 2 Functional Block Diagram Table 5 EM78P447NDK and EM78P447NDM Pin Description4.1.2 R1 Time Clock /Counter 4.1 Operational Registers4.1.1 R0 Indirect Addressing Register 4.1.3 R2 Program Counter & StackFig. 3 Program Counter Organization Reset VectorEM78P447N 00 PAGE0 0000~03FFFig. 4 Data Memory Configuration EM78P447N4.1.7 R8~R1F and R20~R3E General Purpose Register 4.1.5 R4 RAM Select Register4.1.6 R5~R7 Port 5 ~ Port7 EM78P447N4.2.1 A Accumulator 4.2 Special Purpose Registers4.1.8 R3F Interrupt Status Register 4.2.2 CONT Control Register4.2.3 IOC5 ~ IOC7 I/O Port Control Register 4.2.4 IOCB Wake-up Control Register for Port6EM78P447N 4.2.5 IOCE WDT Control Register EM78P447N4.2.6 IOCF Interrupt Mask Register Fig. 5 Sleep Mode and Wake-Up Circuits on I/O Ports Block DiagramEM78P447N 4.3 TCC/WDT & Prescaler Fig. 6 TCC and WDT Block DiagramEM78P447N Fig. 7 a The I/O Port and I/O Control Register Circuit 4.4 I/O PortsEM78P447N Fig.7 b The I/O Port with R-Option P70, P71 Circuit4.5 RESET and Wake-up 4.5.1 RESETEM78P447N EM78P447N Table 6 Usage of Sleep1 and Sleep2 ModeEM78P447N Table 7 The Summary of the Initialized Values for RegistersEM78P447N 0x09~0x3E4.5.2 The Status of RST, T, and P of STATUS Register EM78P447N4.6 Interrupt Fig. 8 Controller Reset Block DiagramEM78P447N EM78P447N 4.7 Oscillator4.7.1 Oscillator Modes Fig. 9 Interrupt Input CircuitFig. 10 Crystal/Resonator Circuit 4.7.2 Crystal Oscillator/Ceramic ResonatorsXTALEM78P447N Fig. 11 Crystal/Resonator Circuit4.7.3 External RC Oscillator Mode EM78P447NFig. 12 External RC Oscillator Mode Circuit 4.8 CODE Option Register 4.8.1 Code Option Register WordEM78P447N EM78P447N Bit 8 CLKS Instruction period option bit 0 two oscillator periodsRESET 4.9 Power On Considerations4.10 External Power On Reset Circuit 4.8.2 Customer ID Register WordVdd EM78P447N RESET 4.11 Residue-Voltage ProtectionVdd EM78P447N RESET EM78P447N4.12 Instruction Set EM78P447NMNEMONIC EM78P447NINSTRUCTION OPERATIONThis instruction is not recommended for R3F operation EM78P447NThis instruction is applicable to IOC5 ~ IOC7, IOCB, IOCE, IOCF only This instruction cannot operate under R3FEM78P447N 4.13 Timing DiagramThis specification is subject to change without further notice TEST POINTS5 ABSOLUTE MAXIMUM RATINGS DC ELECTRICAL CHARACTERISTICSDC Electrical Characteristic EM78P447NAC Electrical Characteristic EM78P447N 8-Bit Microcontroller with OTP ROM6.3 Device characteristic EM78P447NFig.18 Port5, Port6 This specification is subject to change without further noticeEM78P447N and Port7 Voh vs. Ioh,VDD=5VVoh/Ioh VDD=3V This specification is subject to change without further noticeEM78P447N IohmAVol/Iol VDD=5V This specification is subject to change without further noticeEM78P447N IolmAVol/Iol VDD=3V This specification is subject to change without further noticeEM78P447N IolmAVol/Iol This specification is subject to change without further noticeEM78P447N IolmAVol/Iol This specification is subject to change without further noticeEM78P447N IolmAEM78P447N WDT TimeoutThis specification is subject to change without further notice periodR=5.1k EM78P447NR=3.3k R=10kICC1：VDD=3V, Fosc=32 kHz, 2clock, WDT disable EM78P447NEM78P447N Fig. 28 Maximum Operating Current（ICC1 and ICC2） vs. TemperatureFig. 29 Typical Operating Current（ICC3 and ICC4） vs. Temperature Max ICC2Fig. 30 Maximum Operating Current（ICC3 and ICC4） vs. Temperature Maximum ICC3 and ICC4 vs. TemperatureTemperature Fig. 31 Typical Standby Current（ISB1 and ISB2） vs. TemperatureEM78P447N Fig. 32 Maximum Standby Current（ISB1 and ISB2） vs. TemperatureFig. 33 Operating Voltage In Temperature Range from -40 to Max ISB2Fig. 34 EM78P447N I-V Curve Operating at 4 MHz This specification is subject to change without further noticeEM78P447N Fig. 35 EM78P447N I-V Curve Operating at 32.768 kHzEM78P447N APPENDIX A Package TypesB Package Information 20-Lead plastic dual inline package（DIP）－ 300 mil24-Lead plastic dual inline skinny package（DIP）－ 300 mil This specification is subject to change without further noticeEM78P447N 28-Lead plastic dual inline package（DIP）－ 600 mil32-Lead plastic dual inline package（DIP）－ 600 mil This specification is subject to change without further noticeEM78P447N 20-Lead plastic small outline package（SOP）－ 300 mil24-Lead plastic small outline package（SOP）－ 300 mil This specification is subject to change without further noticeEM78P447N 28-Lead plastic small outline package（SOP）－ 300 mil32-Lead plastic small outline package（SOP）－ 300 mil This specification is subject to change without further noticeEM78P447N 28-Lead Shrink Small Outline Package（SSOP）－ 209 mil