Z86D990 Datasheet, PDF (84/102 Pages) Zilog, Inc. – Low-Voltage Micro controllers with ADC

Z86D990/Z86D991 OTP and Z86L99X ROM
Low-Voltage Microcontrollers with ADC
77
T8 Control Register (CTR0)
As shown in Table 40, the T8 Control Register, known as CTR0, controls the oper-
ation of the 8-bit T₈ timer.
Table 40. CTR0 Register (Group/Bank 0Dh, Register 0)
Bit
7
6
5
Bit/Field
Single/
T8_ Mod- Time_
Enable ulo-n Out
R/W
R/W R/W R/W
Reset
0
0
0
R = Read, W = Write, X = Indeterminate
Bit
Position Bit/Field
R/W
7_______ T₈ Enable
R
R
W
W
_6______ Single/
R/W
Modulo-n
__5_____ Time_Out
R
R
W
W
___43___ T₈ Clock
R/W
_____2__
______1_
_______0
Capture Interrupt R/W
Mask
Counter Interrupt R/W
Mask
P40_Out
R/W
4
3
T8_Clock
R/W R/W
0
0
2
1
0
Capture Counter
INT_ INT_ P40_
Mask Mask Out
R/W R/W R/W
0
0
0
Value
1
0
1
0
1
0
1
0
1
0
11
10
01
00
1
0
1
0
1
0
Description
Counter Enabled
Counter Disabled
Enable Counter
Stop Counter
Single Pass
Modulo-n
Counter Timeout Occurred
No Counter Timeout
Reset Flag to 0
No Effect
SCLK/8
SCLK/4
SCLK/2
SCLK
Enable Data Capture Interrupt
Disable Data Capture Interrupt
Enable Time_Out Interrupt
Disable Time_Out Interrupt
P40 configured as T₈ Output
P40 configured as I/O
PS003807-1002
PRELIMINARY