Tcr0: Timer 0 Control Register - Hitachi HD64465 User Manual

9.2.6

TCR0: Timer 0 Control Register

The TCR 0, a 16-bit register, is used to control the timer 0.
Address: H'1000600A
Bit 15
Bit Name reserved reserved reserved reserved reserved reserved reserved reserved
Initial Value 0
R/W R/W
Bit 7
Bit Name reserved reserved reserved EADT
Initial Value 0
R/W R/W
Bit Description
15 - 5 Reserved.
4 This bit is used to enable the A/D converter trigger signal ADTRIG# as timer 0 reaches
zero.
1: Enable the ADTRIG# signal
0: Disable the ADTRIG# signal
3 This bit is used to enable the timer 0 output TMO0#.
1: Output ADTRIG# to port TMO0#
0: Output ADTRIG# to internal ADC
2, 1 These two bits are used for the pre-scale option for the timer 0. The input clock for the
timer 0 is selected by this option.
11: Timer 0 input clock is CKIO
10: Timer 0 input clock is CKIO/4
01: Timer 0 input clock is CKIO/8
00: Timer 0 input clock is CKIO/16
0 This bit is used to start or stop the counting of the timer 0.
1: Start timer 0 counting
0: Stop timer 0 counting
Rev. 3.0, 03/01, page 96 of 390
14 13 12
0 0 0
R/W R/W R/W
6 5 4
0 0 0
R/W R/W R/W
11 10 9
0 0 0
R/W R/W R/W
3 2 1
ETMO0 PST01 PST00
0 0 0
R/W R/W R/W
8
0
R/W
0
T0STP
0
R/W
Default
0
0
0
00
0