CCU 3000, CCU 3000-I
CCU 3001, CCU 3001-I
0236H
Timer 3 Control Register 1
Bit
7
Reset
Read
Write
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
‘1’ = second serial input level enabled
clock select, bit 1: ‘00’ = pin, ‘01’ = fosc.,
clock select, bit 0: ‘10’ = PHI2, ‘11’ = no clock
counter stop: ‘0’ = disabled , ‘1’ = carry out accu
start condition, bit 1: ‘00’= none (always active),
start condition, bit 0: ‘01’ = edge, ‘10’ = pin, ‘11’ =\pin
‘1’ = half load enabled
6
5
4
3
2
1
0
active edge selection: ‘0’ = rising, ‘1’ = falling
0237H
Timer 3 Control Register 2
Bit
7
Reset
Read
Write
x
x
x
x
x
x
x
x
x
x
pin output mode, bit 1: 00 = disabled, 01 = serial out
pin output mode, bit 0: 10 = PWM, 11 = carry accu D
read latch, bit 2: 000 = disabled, 001 = carry accu C
read latch, bit 1: ‘010’ = carry accu D, ‘011’ pin
6
5
4
3
read latch, bit 0: ‘100’ = \pin, ‘101’ = prescaler out-
put, ‘110’ = presc. input, ‘111’ = undefined
2
x
x
accu clock, bit 1: ‘00’ = presc. input,
‘01’ = presc. output
1
0
x
x
x
x
accu clock, bit 0: ‘10’ = pin, ‘11’ = \pin
1 = use acc. C with acc. D as long one (16-bit acc.)
0238H
Timer 3 Control Register 3
Bit
7
Reset
Read
Write
x
x
x
x
x
x
interrupt event, bit 2: ‘000’ = none, ‘001’ = pin
interrupt event, bit 1: ‘010’ = \pin, 011 = carry accu C
6
5
interrupt event, bit 0: ‘100’ = carry accu D,
‘101’, ‘110’, ‘111’ = undefined
4
3
2
1
0
x
x
x
x
x
x
x
x
x
x
load event, bit 1: ‘00’ = none, ‘01’ = carry accu C,
load event, bit 0: 10 = carry accu D, 11 = regist. load
accu C input: ‘0’ = bus register, ‘1’ = –1
accu D input: ‘0’ = bus register, ‘1’ = –1
serial mode enable: ‘0’ = disable, ‘1’ = enable
52
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MICRONAS [ MICRONAS ]
