MDT90P01 Datasheet, PDF (6/11 Pages) Micon Design Technology Corporation – 4-bit micro-controller

MDT90P01
(6) TMRL (Time Mode Register Low Nibble) (only write)
Bit
2—0
3
Symbol
PS1—0
PSC
Function
Prescaler Value
RTCC rate
000
001
010
011
100
101
110
111
Prescaler assignment bit :
0 — RTCC
1 — Watchdog Timer
1:2
1:4
1:8
1 : 16
1 : 32
1 : 64
1 : 128
1 : 256
TMRH (Time Mode Register High Nibble) (only write)
WDT rate
1:1
1:2
1:4
1:8
1 : 16
1 : 32
1 : 64
1 : 128
Bit
Symbol
Function
RTCC signal Edge :
0
TCE
0 — Increment on low-to-high transition on RTCC pin
1 — Increment on high-to-low transition on RTCC pin
RTCC signal set :
1
TCS
0 — Internal instruction cycle clock
1 — Transition on RTCC pin
PortB pull-high :
2
PBPHB 0 — Enable
1 — Disable
PortB wake-up :
3
PBWUB 0 — Enable
1 — Disable
(7) 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.
(8) Configurable options for EPROM (Set by writer) :
Oscilltor Type
INTRC 4Mhz
INTRC 8Mhz
Watchdog Timer control
Watchdog timer disable all the time
Watchdog timer enable all the time
This specification is subject to be changed without notice. Please visit our web site for the most updated information.
http://www.mdtic.com.tw
P. 6
2008/5 Ver. 1.0