W78ERD2 Datasheet, PDF (13/72 Pages) Winbond – 8-BIT MICROCONTROLLER

W78ERD2
Timer Mode Control
Bit:
7
6
5
4
3
2
1
0
GATE C/T
M1
M0 GATE C/T
M1
M0
Mnemonic: TMOD
Address: 89h
BIT NAME
FUNCTION
Gating control: When this bit is set, Timer/counter x is enabled only while INTx pin
7 GATE _{is high and TRx control bit is set. When cleared, Timer x is enabled whenever TRx}
control bit is set.
6
Timer or Counter Select: When cleared, the timer is incremented by internal clocks.
C/T _{When set, the timer counts high-to-low edges of the Tx pin.}
5 M1 Mode Select bits:
4 M0 Mode Select bits:
Gating control: When this bit is set, Timer/counter x is enabled only while INTx pin
3 GATE _{is high and TRx control bit is set. When cleared, Timer x is enabled whenever TRx}
control bit is set.
2
Timer or Counter Select: When cleared, the timer is incremented by internal clocks.
C/T _{When set, the timer counts high-to-low edges of the Tx pin.}
1 M1 Mode Select bits:
0 M0 Mode Select bits:
M1, M0: Mode Select bits:
M1 M0 Mode
0 0 Mode 0: 8-bits with 5-bit prescale.
0 1 Mode 1: 18-bits, no prescale.
1 0 Mode 2: 8-bits with auto-reload from THx
1 1 Mode 3: (Timer 0) TL0 is an 8-bit timer/counter controlled by the standard Timer 0
control bits. TH0 is a 8-bit timer only controlled by Timer 1 control bits. (Timer 1)
Timer/counter is stopped.
Timer 0 LSB
Bit:
7
6
TL0.7 TL0.6
Mnemonic: TL0
TL0.7-0: Timer 0 Low byte
5
4
3
TL0.5 TL0.4 TL0.3
Address: 8Ah
2
TL0.2
1
TL0.1
0
TL0.0
- 13 -
Publication Release Date: April 20, 2005
Revision A4