Z86L972 Datasheet, PDF (76/91 Pages) Zilog, Inc. – Low-Voltage Microcontrollers

Z86L972/Z86L973/Z86L974
Low-Voltage Microcontrollers
69
T8/T16 Control Register B (CTR3)
The T8/T16 Control Register B, known as CTR3, is a new register to the Z86L972/
Z86L973/Z86L974 family. This register allows the T₈ and T₁₆ counters to be syn-
chronized. The settings of CTR3 are described in Table 37.
Table 37. CTR3 Register (Group/Bank 0Dh, Register 3)
Bit
7
6
5
4
3
2
1
0
Bit/Field
T16_ T8_ Sync
Enable Enable Mode Reserved
R/W
R/W R/W R/W R/W R/W R/W R/W R/W
Reset
0
0
0
X
X
X
X
X
R = Read, W = Write, X = Indeterminate
Bit
Position
Bit/Field
R/W Value Description
7_______ T₁₆ Enable
R
1
R
0
W
1
W
0
Counter Enabled
Counter Disabled
Enable Counter
Stop Counter
_6______ T₈ Enable
R
1
R
0
W
1
W
0
Counter Enabled
Counter Disabled
Enable Counter
Stop Counter
__5_____ Sync Mode
R/W 1
0
Enable Sync Mode
Diable Sync Mode
___43210 Reserved
R
1
W
X
Always reads 11111
No Effect
PS010504-1002
PRELIMINARY