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Introduction
Dedicated registers
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DEDICATED REGISTERS

These are memory locations used inside the HD63B01Y0 microprocessor chip. Full details on how they are used can be found in the section 6301 MICROPROCESSOR DATA. For example, to configure one of the spare parallel ports (Port 6) for input on bits 0-3 and output on bits 4-7 type

 

HEX F0 16 C!

 

This writes data hex F0 to address 16, the data direction register for the port.

NOTES

q       Addresses not shown are external and available for use

q       R=Read only register. W=Write only register (data read back will be meaningless). R/W= Read/Write register

q       The last column shows data initialised at reset by either the microprocessor chip hardware or the Forth system.

q       Initialisations not shown indicate indefinite data

 

Addr

Register

Abbrev

R/W

Init

01

Port 2 Data Direction Register

P2DDR

W

 

03

Port 2 Input/Output

PORT2

R/W

7F

08

Timer Control/Status Register 1

TCSR1

R/W

04

09

Free Running Counter (MSB)

FRCH

R/W

00

0A

Free Running Counter (LSB)

FRCL

R/W

00

0B

Output Compare Register 1 (MSB)

OCR1H

R/W

FF

0C

Output Compare Register 1 (LSB)

OCR1L

R/W

FF

0D

Input Capture Register (MSB)

ICRH

R

00

0E

Input Capture Register (LSB)

ICRL

R

00

0F

Timer Control/Status Register 2

TCSR2

R/W

10

10

Rate/Mode Control Register

RMCR

R/W

C5

11

Tx/Rx Control Status Register 1

TRCSR1

R/W

2B

12

Receive Data Register

RDR

R

 

13

Transmit Data Register

TDR

W

 

14

RAM/Port 5 Control Register

RP5CR

R/W

E0

15

Port 5 Input/Output

PORT5

R/W

 

16

Port 6 Data Direction Register

P6DDR

W

00

17

Port 6 Input/Output

PORT6

R/W

 

19

Output Compare Register 2 (MSB)

OCR2H

R/W

FF

1A

Output Compare Register 2 (LSB)

OCR2L

R/W

FF

1B

Timer Control/Status Register 3

TCSR3

R/W

20

1C

Time Constant Register

TCONR

W

FF

1D

Timer 2 Up Counter

T2CNT

R/W

00

1E

Tx/Rx Control Status Register 2

TRCSR2

R/W

28

1F

Chip test register. Do not access

TSTREG

   

20

Port 5 Data Direction Register

P5DDR

W

00

21

Port 6 Control/Status Register

P6CSR

R/W

07

22-27

Reserved by Hitachi

     
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