SST89E52RD2_06 Datasheet, PDF (26/81 Pages) Silicon Storage Technology, Inc – FlashFlex51 MCU

FlashFlex51 MCU
SST89E52RD2/RD / SST89E54RD2/RD / SST89E58RD2/RD
SST89V52RD2/RD / SST89V54RD2/RD / SST89V58RD2/RD
Data Sheet
Watchdog Timer Data/Reload Register (WDTD)
Location
7
6
5
4
3
2
1
0
Reset Value
85H
Watchdog Timer Data/Reload
00H
Symbol
WDTD
Function
Initial/Reload value in Watchdog Timer. New value won’t be effective until WDT is set.
PCA Timer/Counter Control Register¹ (CCON)
Location
7
6
D8H
CF
CR
1. Bit addressable
5
4
-
CCF4
3
CCF3
2
CCF2
1
CCF1
0
CCF0
Reset Value
00x00000b
Symbol
CF
CR
-
CCF4
CCF3
CCF2
CCF1
CCF0
Function
PCA Counter Overflow Flag
Set by hardware when the counter rolls over. CF flags an interrupt if bit ECF in CMOD
is set. CF may be set by either hardware or software, but can only cleared by software.
PCA Counter Run control bit
Set by software to turn the PCA counter on. Must be cleared by software to turn the
PCA counter off.
Not implemented, reserved for future use.
Note: User should not write ‘1’s to reserved bits. The value read from a reserved bit is indeterminate.
PCA Module 4 interrupt flag. Set by hardware when a match or capture occurs.
Must be cleared by software.
PCA Module 3 interrupt flag. Set by hardware when a match or capture occurs.
Must be cleared by software.
PCA Module 2 interrupt flag. Set by hardware when a match or capture occurs.
Must be cleared by software.
PCA Module 1 interrupt flag. Set by hardware when a match or capture occurs.
Must be cleared by software.
PCA Module 0 interrupt flag. Set by hardware when a match or capture occurs.
Must be cleared by software.
©2006 Silicon Storage Technology, Inc.
26
S71255-05-000
5/06