參數(shù)資料
型號(hào): UPD75068
廠商: NEC Corp.
英文描述: 4-BIT SINGLE-CHIP MICROCOMPUTER
中文描述: 4位單片機(jī)
文件頁數(shù): 23/68頁
文件大?。?/td> 640K
代理商: UPD75068
23
μ
PD75064, 75066, 75068, 75064(A), 75066(A), 75068(A)
5.6 Timer/Event Counter
The
μ
PD75068 has an on-chip 1-ch timer/event counter. The timer/event counter has the following
functions:
Programmable interval timer operation
Outputs square-wave signal of a user-selectable frequency to the PTO0 pin
Event counter operation
Divides the TI0 pin input by N and outputs to the PTO0 pin (frequency divider operation)
Supplies serial shift clock to the serial interface circuit
Count condition read-out function.
Figure 5-5. Block Diagram of Timer / Event Counter
Count register (8)
P13/
TI0
Note
Instruction execution
MPX
Timer operation start signal
8
8
8
From the
clock
generator
Internal bus
TM07 TM06 TM05
TM04 TM03 TM02 TM01 TM00
PORT1.3
(Refer to Fig. 5-1.)
Comparator (8)
Modulo register (8)
TO
enable
flag
P20
output
latch
signal
Port 2
input/
output
mode
Clear
signal
T0
TMOD0
Bit 2 of PGMB
P20/PTO0
Output
buffer
Reset
RESET
IRQT0 clear
signal
TOUT
F/F
TM0
SET1
Note
Input buffer
IRQT0
set signal
INTT0
PORT2.0
TOE0
To serial
interface
CP
Match
8
8
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