UPD75238GJ

Manufacturer Part NumberUPD75238GJ
Description4 BIT SINGLE-CHIP MICROCOMPUTER
ManufacturerNEC [NEC]
UPD75238GJ datasheet
 
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1.
PIN FUNCTIONS ........................................................................................................................
1.1
PORT PINS ......................................................................................................................................
1.2
NON-PORT PINS ............................................................................................................................
1.3
PIN INPUT/OUTPUT CIRCUITS ....................................................................................................
1.4
CONNECTION OF UNUSED PD75238 PINS ..............................................................................
2.
ARCHITECTURE AND MEMORY MAP OF THE PD75238 ...................................................
2.1
DATA MEMORY BANK CONFIGURATION AND ADDRESSING MODES ................................
2.2
GENERAL REGISTER BANK CONFIGURATION ..........................................................................
2.3
MEMORY-MAPPED I/O .................................................................................................................
3.
INTERNAL CPU FUNCTIONS ....................................................................................................
3.1
PROGRAM COUNTER (PC) ...........................................................................................................
3.2
PROGRAM MEMORY (ROM) ........................................................................................................
3.3
DATA MEMORY (RAM) .................................................................................................................
3.4
GENERAL REGISTERS ...................................................................................................................
3.5
ACCUMULATORS ..........................................................................................................................
3.6
STACK POINTER (SP) AND STACK BANK SELECT REGISTER (SBS) .....................................
3.7
PROGRAM STATUS WORD (PSW) ..............................................................................................
3.8
BANK SELECT REGISTER (BS) .....................................................................................................
4.
PERIPHERAL HARDWARE FUNCTIONS ..................................................................................
4.1
DIGITAL I/O PORTS .......................................................................................................................
4.2
CLOCK GENERATOR ......................................................................................................................
4.3
CLOCK OUTPUT CIRCUIT .............................................................................................................
4.4
BASIC INTERVAL TIMER ...............................................................................................................
4.5
TIMER/EVENT COUNTER .............................................................................................................
4.6
CLOCK TIMER .................................................................................................................................
4.7
TIMER/PULSE GENERATOR .........................................................................................................
4.8
EVENT COUNTER ..........................................................................................................................
4.9
SERIAL INTERFACE .......................................................................................................................
4.10
A/D CONVERTER ........................................................................................................................... 113
4.11
BIT SEQUENTIAL BUFFER ............................................................................................................ 119
4.12
FIP CONTROLLER/DRIVER ............................................................................................................ 119
5.
INTERRUPT FUNCTION ............................................................................................................ 131
5.1
CONFIGURATION OF THE INTERRUPT CONTROL CIRCUIT .................................................... 131
5.2
HARDWARE OF THE INTERRUPT CONTROL CIRCUIT .............................................................. 133
5.3
INTERRUPT SEQUENCE ................................................................................................................ 138
5.4
MULTIPLE INTERRUPT PROCESSING CONTROL ...................................................................... 139
5.5
VECTOR ADDRESS SHARE INTERRUPT PROCESSING ............................................................ 141
CONTENTS
PD75238
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