UPD17230MC-XXX-5A4 View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

UPD17230MC-XXX-5A4

4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER

NEC => Renesas Technology 

µPD17230, 17231, 17232, 17233, 17234, 17235, 17236

2.4.2 System registers (SYSREG)

The system registers are registers that are directly related to control of the CPU. These registers are mapped to

addresses 74H-7FH on the data memory and can be referenced regardless of bank specification.

The system registers include the following registers:

• Address registers (AR0-AR3)

• Window register (WR)

• Bank register (BANK)

• Memory pointer enable flag (MPE)

• Memory pointers (MPH, MPL)

• Index registers (IXH, IXM, IXL)

• General register pointers (RPH, RPL)

• Program status word (PSWORD)

Figure 2-7. Configuration of System Register

Address 74H 75H 76H 77H 78H 79H 7AH 7BH 7CH 7DH 7EH 7FH

Name

Address register

(AR)

Window Bank

register register

(WR) (BANK)

Index register

(IX)

Data memory

row address

pointer (MP)

General

register

pointer

(RP)

Program

status

word

(PSWORD)

IXH

IXM

Symbol AR 3 AR 2 AR 1 AR 0 WR BANK

IXL RPH RPL PSW

MPH MPL

Bit b3 b2 b1 b0 b3 b2 b1 b0 b3 b2 b1 b0 b3 b2 b1 b0 b3 b2 b1 b0 b3 b2 b1 b0 b3 b2 b1 b0 b3 b2 b1 b0 b3 b2 b1 b0 b3 b2 b1 b0 b3 b2 b1 b0 b3 b2 b1 b0

Data

0 0 (AR) (µPD17234,17235,17236)

0 0 0 (AR) (µPD17232,17233)

0000

(AR) (µPD17231)

0 0 0 0 0 (AR) (µPD17230)

(WR)

(BANK) M

000 P00 0

E

(IX)

(MP)

(RP) B C C I

000

CMY Z X

DP

E

Initial

Value

At

Reset

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Undefined 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

Data Sheet U14360EJ1V0DS00

21

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