HD64570 Datasheet, PDF (446/469 Pages) Hitachi Semiconductor – Serial Communications Adaptor

Address
Register
CPU CPU
Mode Mode
0, 1 2, 3 Remarks
Timer (Channel 2)
Timer up-counter Channel 70H 71H
2: TCNTL Channel 2
Read/write
Initial value
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 71H 70H
2: TCNTH Channel 2
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 2: TCONRL
Channel 2
Timer Constant Register
Channel 2: TCONRH
Channel 2
72H 73H
73H
72H
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
Timer Control/Status
74H
Register Channel 2: TCSR
Channel 2
75H
Bit name
Read/Write
Initial value
7
6
5
CMF ECMI —
R R/W —
0
0
0
4
3
TME —
R/W —
0
0
2
1
0
———
———
0
0
0
Compare match flag
Timer enable
0: TCNT and TCONR
are not equal
1: TCNT and TCONR
are equal
0: Stops incrementation
1: Starts incrementation
CMF interrupt enable
0: Disable
1: Enable
Rev. 0, 07/98, page 430 of 453