Z51F3220FNX Datasheet, PDF (168/312 Pages) Zilog, Inc. – Z8051 Series 8-Bit Microcontrollers

Z51F3220
Product Specification
T4CR (Timer 4 Control Register) : 1002H (ESFR)
7
6
5
4
16BIT
T4MS
T4CN
T4ST
R/W
R/W
R/W
R/W
3
T4CK3
R/W
2
T4CK2
R/W
1
T4CK1
R/W
0
T4CK0
R/W
Initial value : 00H
16BIT
T4MS
T4CN
T4ST
T4CK[3:0]
Select Two 8-bit or 16-bit Mode for Timer 3/4
0
Two 8-bit Timer 3/4
1
16-bit Timer 3
Control Timer 4 Operation Mode
0
Timer/counter mode (T4O: toggle at match)
1
Capture mode (the match interrupt can occur)
Control Timer 4 Count Pause/Continue
0
Temporary count stop
1
Continue count
Control Timer 4 Start/Stop
0
Counter stop
1
Clear counter and start
Select Timer 4 clock source. fx is main system clock frequency
T4CK3 T4CK2 T4CK1 T4CK0 Description
0
0
0
0
fx/1
0
0
0
1
fx/2
0
0
1
0
fx/3
0
0
1
1
fx/8
0
1
0
0
fx/16
0
1
0
1
fx/32
0
1
1
0
fx/64
0
1
1
1
fx/128
1
0
0
0
fx/256
1
0
0
1
fx/512
1
0
1
0
fx/1024
1
0
1
1
fx/2048
1
1
0
0
fx/406
1
1
0
1
fx/8192
1
1
1
0
fx/16384
1
1
1
1
Timer 3 clock (only 16-Bit Timer 3)
PS029902-0212
PRELIMINARY
165