HD64570 Datasheet, PDF (447/469 Pages) Hitachi Semiconductor – Serial Communications Adaptor

Address
Register
CPU CPU
Mode Mode
0, 1 2, 3 Remarks
Timer (Channel 2)
7
Timer Expand Prescale
75H 74H Bit name
—
Register Channel 2: TEPR
Channel 2
Read/Write
—
Initial value
0
6
5
4
3
2
1
0
— — — — ECKS2 ECKS1 ECKS0
— — — — R/W R/W R/W
0
0
0
0
0
0
0
Not used
76H
Not used
77H
Timer (Channel 3)
Timer up-counter Channel 78H
3: TCNTL Channel 3
77H
76H
79H
Read/write
Initial value
Expand clock input select
000: BC
001: BC/2
010: BC/4
011: BC/8
100: BC/16
101: BC/32
110: BC/64
111: BC/128
7
6
5
4
3
2
1
0
R/W R/W R/W R/W R/W R/W R/W R/W
0
0
0
0
0
0
0
0
Timer up-counter Channel 79H 78H
3: TCNTH Channel 3
15 14 13 12 11 10
9
8
Read/Write
Initial value
R/W R/W R/W R/W R/W R/W R/W R/W
0
0
0
0
0
0
0
0
Timer Constant Register
Channel 3: TCONRL
Channel 3
Timer Constant Register
Channel 3: TCONRH
Channel 3
7AH 7BH
7BH
7AH
Read/Write
Initial value
Read/write
Initial value
7
6
5
4
3
2
1
0
WWWWWWWW
1
1
1
1
1
1
1
1
15 14 13 12 11 10
9
8
WWWWWWWW
1
1
1
1
1
1
1
1
Rev. 0, 07/98, page 431 of 453