MDT10P23CC Datasheet, PDF (7/18 Pages) Micon Design Technology Corporation – 8-bit micro-controller

9) TMR (Time Mode Register)
MDT10P23(CC )
Bit
20
3
4
5
Symbol
PS2 0
PSC
TCE
TCS
Function
Prescaler Value
RTCC rate
WDT rate
000
1:2
1:1
001
1:4
1:2
010
1:8
1:4
011
1 : 16
1:8
100
1 : 32
1 : 16
101
1 : 64
1 : 32
110
1 : 128
1 : 64
111
1 : 256
Prescaler assignment bit :
0 RTCC
1 : 128
1 Watchdog Timer
RTCC signal Edge :
0 Increment on low-to-high transition on RTCC pin
1 Increment on high-to-low transition on RTCC pin
RTCC signal set :
0 Internal instruction cycle clock
1 Transition on RTCC pin
(10) CPIO A, CPIO B (Control Port I/O Mode Register)
The CPIO register is “write-only”
“0”, I/O pin in output mode;
“1”, I/O pin in input mode.
(11) EPROM Option by writer programming :
A. FIRST WORD
Oscillator Type
RC Oscillator
LFXT Oscillator
XTAL Oscillator
HFXT Oscillator
Oscillator Start-up Time
150 µs
20 ms
40 ms
80 ms
Watchdog Timer control
Watchdog timer disable all the time
Watchdog timer enable all the time
This specification are subject to be changed without notice. Any latest information
please preview http;//www.mdtic.com.tw
P. 7
2005/6 Ver. 1.4