Mitsubishi DS5000TK Guia do Utilizador descarregar pdf (Página 54)

USER’S GUIDE

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DS2251T–128 BLOCK DIAGRAM Figure 5–6

DS2251T

DS5001FP 128K X 8 SRAM

REAL TIME CLOCK

BYTE–WIDE ADDRESS BUS

BYTE–WIDE DATA BUS

(14)

(8)

R/W

INTA

INTB

INTP

SQW

+3V

PORT0

PORT1

PORT2

PORT3

ALE

RST

PSEN

PROG

VRST

PE3

PE4

XTAL1

XTAL2

GND

CCO

ADDR

R/W

DATA

CE1

PE1

72 PINS

DS1283

1 2 ... 49 50 51 52 53 54 55 56 57 58 59 ... 173 174

TABLE OF CONTENTS 1
SECTION 1: INTRODUCTION 2
SOFTWARE SECURITY 2
SEPARATE ADDRESS/DATA BUS 2
LARGE NONVOLATILE MEMORY 3
IN–SYSTEM LOADING 3
HIGH RELIABILITY OPERATION 3
PRODUCT DESCRIPTION 4
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SECTION 2: SELECTION GUIDE 6
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INTERNAL DATA BUS 8
INTERNAL ADDRESS BUS 8
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Watchdog Timer 10
Resident Loader ROM 10
Secure Microcontroller Memory 11
Organization 11
Internal Registers 11
Programmer’s note 12
Program and Data Memory 13
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DS5000 Memory Map Control 16
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DS5001/DS5002 Memory Mapped 20
Peripherals 20
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Special Function Registers 28
PA3 PA2 PA1 PA0 RA32/8 ECE2 29
POWER CONTROL REGISTER 31
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TIMER CONTROL REGISTER 33
TIMER MODE REGISTER 34
SERIAL CONTROL REGISTER 35
INTERRUPT ENABLE REGISTER 36
INTERRUPT PRIORITY REGISTER 37
DS5001 CRC REGISTER 38
DS5001 MCON REGISTER 40
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PROGRAM STATUS WORD REGISTER 42
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INSTRUCTION SET 46
Introduction 46
Addressing Modes 46
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Program Status Flags 48
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DATA RETENTION 56
BATTERY BACKED CIRCUITS 56
BATTERY ATTACH PROCEDURE 57
BATTERY LIFETIME 57
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LITHIUM BATTERY USAGE 59
FRESHNESS SEAL 59
SECTION 7: POWER MANAGEMENT 60
Idle Mode 60
Stop Mode 61
Voltage Monitoring Circuitry 62
Power Fail Interrupt 63
Total Power Failure 63
Partial Power Failures 63
SECTION 8: SOFTWARE CONTROL 65
Timed Access 65
TIMED ACCESS Figure 8–1 65
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WATCHDOG TIMER Figure 8–2 68
WATCHDOG TIMER CONTROL BITS 69
CRC MEMORY VERIFICATION 69
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CRC CODE EXAMPLE Figure 8–3 71
SECTION 9: FIRMWARE SECURITY 72
SECURITY OVERVIEW 72
SECURITY LOCK 73
RAM Memory 73
Encrypted Memory 73
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Encryption Algorithm 76
Encryption Key 76
Dummy Bus Access 77
On–chip Vector RAM 78
Self–Destruct Input 78
Microprobe/Die Top Coating 78
Random Number Generator 78
Security Summary by Part 79
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Change Code 81
External Circuits 81
Tamper Protection 81
SECTION 10: RESET CONDITIONS 82
Reset Sources 82
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Power On Reset 84
Power On Reset 85
External Reset 85
Watchdog Timer Reset 85
Memory Map 86
Interrupts 87
Protection 88
SECTION 11: INTERRUPTS 89
INTERRUPT SOURCES 89
External Interrupts 90
Timer Interrupts 90
Serial Port Interrupts 90
Power–fail Warning Interrupt 90
Simulated Interrupts 91
INTERRUPT PRIORITIES 93
INTERRUPT ACKNOWLEDGE 94
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SECTION 12: PARALLEL I/O 96
OVERVIEW 96
PORT 1 FUNCTIONAL CIRCUITRY 97
PORT 2 FUNCTIONAL CIRCUITRY 97
PORT 3 FUNCTIONAL CIRCUITRY 98
OUTPUT FUNCTIONS 98
INPUT FUNCTION 99
REPROGRAMMABLE PERIPHERAL 100
CONTROLLER (RPC) 100
RPC INTERRUPTS 101
Bit Description: 102
RPC PROTOCOL 103
DMA OPERATION 103
FUNCTIONAL DESCRIPTION 105
Bit Description 105
USER’S GUIDE 106
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SECTION 14: SERIAL I/O 110
FUNCTION DESCRIPTION 110
SCON.2: RB8 112
SCON.1: TI 112
SCON.0: RI 112
BAUD RATE GENERATION 112
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TRANSMIT TIMING: 115
RECEIVE TIMING: 115
ASYNCHRONOUS OPERATION 116
Mode 2 and 3 117
APPLICATION: SERIAL PORT 120
INITIALIZATION 120
SERIAL I/O OPERATING MODES 120
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SECTION 15: CPU TIMING 124
OSCILLATOR 124
INSTRUCTION TIMING 125
EXPANDED DATA MEMORY TIMING 129
SECTION 16: PROGRAM LOADING 130
INTRODUCTION 130
INVOKING THE BOOTSTRAP LOADER 130
DS5000 Series 131
DS5001/DS5002 Series 131
EXITING THE LOADER 131
SERIAL PROGRAM LOAD MODE 133
AUTO–BAUD RATE DETECTION 134
COMMAND LINE INTERFACE 135
COMMAND LINE SYNTAX 135
COMMAND SUMMARIES 136
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Xon/Xoff 138
DS5002FP COMMANDS 138
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INTEL HEX FILE FORMAT 140
PARALLEL PROGRAM LOAD MODE 142
PARALLEL PROGRAMMING CONCERNS 143
RPC PROGRAM MODE OPERATION 143
SECTION 17: REAL–TIME CLOCK 144
DS1215 PHANTOM TIME CHIP 144
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REGISTERS 148
SPECIAL BITS 148
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MEMORY MAP 151
TIME–OF–DAY ALARM 152
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DS1283 RTC INTERRUPTS 154
(DS1215 EXAMPLE) 155
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(DS1283 EXAMPLE) 159
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SECTION 18: TROUBLESHOOTING 164
UNEXPLAINED DEVICE RESETS 164
WRONG TIME 164
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OGRAM BRANCHING 174

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Mitsubishi DS5000TK Guia do Utilizador Página 54

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