HD404369 Datasheet, PDF(11/117 Page) Hitachi Semiconductor

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HD404369 Datasheet, PDF (11/117 Pages) Hitachi Semiconductor – 4-bit HMCS400-Series microcomputer

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RAM Memory Map

HD404369 Series

$000

$040

$050

RAM-mapped registers

Memory registers (MR)

Data (432 digits)

$200

Not used

$3C0

$3FF

Stack (64 digits)

$000

$003

$004

$005

$006

$007

$008

$009

$00A

$00B

$00C

$00D

$00E

$00F

Initial values

after reset

Interrupt control bits area

Port mode register A (PMRA) W

0000

Serial mode register

(SMR) W

0000

Serial data register lower (SRL) R/W Undefined

Serial data register upper (SRU) R/W Undefined

Timer mode register A (TMA) W

0000

Timer mode register B1 (TMB1) W

0000

Timer B

(TRBL/TWBL) R/W *2/0000 *1

(TRBU/TWBU) R/W Undefined

Miscellaneous register (MIS) W

0000

Timer mode register C (TMC) W

0000

Timer C

(TRCL/TWCL) R/W *2/0000

(TRCU/TWCU) R/W Undefined

Not used

$016 A/D channel register

(ACR) W

$017 A/D data register lower (ADRL) R

$018 A/D data register upper (ADRU) R

$019 A/D mode register 1 (AMR1) W

$01A A/D mode register 2 (AMR2) W

0000

1000

0000

-000

Not used

Notes: 1. Two registers are mapped

on the same area ($00A,

$00B, $00E, $00F).

2. Undefined.

R: Read only

W: Write only

R/W: Read/write

$020

$023

$024 Port mode register B

$025 Port mode register C

(PMRB) W

(PMRC) W

$026 Timer mode register B2 (TMB2) W

$027 System clock selection register 1 (SSR1) W

$028 System clock selection register 2 (SSR2) W

Not used

$02C

$02D

$02E

$02F

$030

Port D0âD3 DCR

Port D4âD7 DCR

Port D8âD11 DCR

Port D12, D13 DCR

Port R0 DCR

(DCD0) W

(DCD1) W

(DCD2) W

(DCD3) W

(DCR0) W

$031 Port R1 DCR

$032 Port R2 DCR

(DCR1) W

(DCR2) W

$033 Port R3 DCR

(DCR3) W

$034 Port R4 DCR

$035 Port R5 DCR

(DCR4) W

(DCR5) W

$036

$037

$038

Port R6 DCR

Port R7 DCR

Port R8 DCR

(DCR6) W

(DCR7) W

(DCR8) W

$039 Port R9 DCR

(DCR9) W

$03F

Not used

0000

00-0

-000

000-

--00

0000

--00

0000

-000

0000

$00A Timer read register B lower (TRBL) R Timer write register B lower (TWBL) W

$00B Timer read register B upper (TRBU) R Timer write register B upper (TWBU) W

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

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

Figure 2 RAM Memory Map

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