z80189 ZiLOG Semiconductor, z80189 Datasheet - Page 174
z80189
Manufacturer Part Number
z80189
Description
Z80180, Z8s180, Z8l180 Mpu Operation
Manufacturer
ZiLOG Semiconductor
Datasheet
1.Z80189.pdf
(326 pages)
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Timer Data Register 0L (TMDR0L: 0CH)
Timer Data Register 0H (TMDR0H: 0DH)
Bit
Bit/Field
R/W
Reset
Note: R = Read W = Write X = Indeterminate ? = Not Applicable
Bit
Bit/Field
R/W
Reset
Note: R = Read W = Write X = Indeterminate ? = Not Applicable
7
7
Timer Reload Register (RLDR: I/O Address = CH0: 0EH,
0FH, CHI, 16H, 17H)
PRT0 and PRT1 each contain 16-bit Timer Reload Registers (RLDR).
RLDR0 and RLDR1 are each accessed as low and high byte registers
(RLDR0H, RLDR0L and RLDR1H, RLDR1L). During RESET, RLDR0
and RLDR1 are set to
When the TMDR counts down to
contents of RLDR.
6
6
5
5
FFFFH
4
4
Timer Data
Timer Data
R/W
R/W
0
0
0
, it is automatically reloaded with the
3
3
Family MPU User Manual
2
2
UM005003-0703
1
1
Z8018x
0
0
159
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