
Preliminary W79E217A Data Sheet
Publication Release Date: December 14, 2007
- 48 -
Revision A3.0
TIMER 3 CONTROL
Bit:
7
6
5
4
3
2
1
0
TF3
-
-
-
-
TR3
-
CMP/RL3
Mnemonic: T3CON
Address: C3h
BIT
NAME
FUNCTION
7
TF3
Timer 3 overflows flag. This bit is set when Timer 3 overflows. It is cleared only
by software and set by hardware.
6-3
-
Reserved.
2
TR3
Timer 3 Run Control. This bit enables/disables the operation of timer 3. Halting
this will preserve the current count in TH3, TL3.
1
-
Reserved.
0
CMP/RL3
Compare/Reload Select. This bit determines whether the Timer 3 will be use for
compare or reload function.
0 = Timer 3 as reload mode, TF3 indicates the overflow flag
1 = Timer 3 as compare mode, TF3 indicates the compare match flag.
POWER MANAGEMENT REGISTER
Bit:
7
6
5
4
3
2
1
0
-
-
-
-
-
ALEOFF
-
DME0
Mnemonic: PMR
Address: C4h
BIT
NAME
FUNCTION
7-3
-
Reserved.
2
ALEOFF
This bit disables the expression of the ALE signal on the device pin during all on
board program and data memory accesses. External memory accesses will
automatically enable ALE independent of ALEOFF. ALEOFF=0: ALE expression
is enabled. ALEOFF=1: ALE expression is disabled.
1
-
Reserved.
0
DME0
This bit determines the on chip MOVX SRAM to be enabled or disabled. Set this
bit to 1 will enable the on chip 2 KB MOVX SRAM.
FAULT SAMPLING TIME REGISTER
Bit:
7
6
5
4
3
2
1
0
SCMP1
SCMP0
SFP1
SFP0
SFCEN
SFCST
SFCDIR
LSBD
Mnemonic: FSPLT
Address: C5h