Z8S180 Zilog., Z8S180 Datasheet - Page 187

• Manufacturer Part Number: Z8S180
• Description: ENHANCED Z180 MICROPROCESSOR
• Manufacturer: Zilog.

172
Free Running counter (FRC: 18H)
UM005001-ZMP0400
Bit
Bit/Field
R/W
Reset
Note: R = Read W = Write X = Indeterminate ? = Not Applicable
Z 8018x Fam il y
M PU Us e r M anual
Miscellaneous
Free Running Counter (I/O Address =
If data is written into the free running counter, the interval of DRAM
refresh cycle and baud rates for the ASCI and CSI/O are not guaranteed.
In IOSTOP mode, the free running counter continues counting down. It is
initialized to
7
6
FFH
during RESET.
5
Counting Data
4
R
?
3
18H
)
2
1
0