HD404654 Datasheet, PDF(9/111 Page) Hitachi Semiconductor

English

English German Russian Spanish Italian Polish Chinese Japanese Korean French Portuguese	Language :

HD404654 Datasheet, PDF (9/111 Pages) Hitachi Semiconductor – 4-Bit Single-Chip Microcomputer

◁

RAM-mapped registers

$000

Memory registers (MR)

$040

$050

Not used

144

$090

Data (432 digits)

576

960

1023

Not used

Stack (64 digits)

$240

$3C0

$3FF

R: Read only

W: Write only

R/W: Read/Write

HD404654 Series

Interrupt control bits area

4 Port mode register A

(PMRA) W

5 Serial mode register 1A (SM1A) W

6 Serial data register 1 lower (SR1L) R/W

7 Serial data register 1 upper (SR1U) R/W

8 Timer mode register A

(TMA) W

Not used

12 Miscellaneous register

(MIS) W

13 Timer mode register C1 (TMC1) W

14 Timer C

(TRCL/TWCL) R/W

(TRCU/TWCU) R/W

16 Timer mode register D1 (TMD1) W

17 Timer D

(TRDL/TWDL) R/W

(TRDU/TWDU) R/W

Not used

20 Timer mode register C2 (TMC2) R/W

21 Timer mode register D2 (TMD2) R/W

Not used

23 Compare data register

(CDR) R

24 Compare enable register (CER) W

25 TG mode register

(TGM) W

26 TG control register

(TGC) W

$000

$003

$004

$005

$006

$007

$008

$009

$00B

$00C

$00D

$00E

$00F

$010

$011

$012

$013

$014

$015

$016

$017

$018

$019

$01A

$01B

Not used

36 Port mode register B (PMRB) W

37 Port mode register C (PMRC) W

Not used

39 Detection edge select register 2 (ESR2) W

40 Serial mode register 1B (SM1B) W

41 System clock select register 1 (SSR1) W

42 System clock select register 2 (SSR2) W

Not used

44 Port D0 to D3 DCR

(DCD0) W

45 Port D4 to D7DCR

(DCD1) W

46 Port D8 and D9 DCR

(DCD2) W

Not used

48 Port R0 DCR

(DCR0) W

49 Port R1 DCR

(DCR1) W

50 Port R2 DCR

(DCR2) W

51 Port R3 DCR

(DCR3) W

52 Port R4 DCR

(DCR4) W

$01F

$020

$023

$024

$025

$026

$027

$028

$029

$02A

$02B

$02C

$02D

$02E

$02F

$030

$031

$032

$033

$034

$035

Not used

Two registers are mapped

on the same area.

$03F

14 Timer read register C lower (TRCL) R Timer write register C lower (TWCL) W $00E

15 Timer read register C upper (TRCU) R Timer write register C upper (TWCU) W $00F

17 Timer read register D lower (TRDL) R Timer write register D lower (TWDL) W $011

18 Timer read register D upper (TRDU) R Timer write register D upper (TWDU) W $012

Figure 2 RAM Memory Map

▷