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4282 Datasheet(PDF) 11 Page - Renesas Technology Corp

Part # 4282
Description  SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
PDF  69 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

4282 Datasheet(HTML) 11 Page - Renesas Technology Corp

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Rev.1.33
Mar 18, 2004
page 11 of 67
4282 Group
Fig. 13 Timers structure
XIN
Frequency divider
(divided by 4)
INSTCK
(Instruction clock)
Frequency divider
(divided by 8)
STCK (System clock)
Initializing signal
WRST instruction
System reset
INSTCK
Q
S
R
CCK instruction
Initializing signal
(Note 4)
(Note 3)
Synchronous
circuit
14-bit timer (WDT)
13
0
5
Initializing signal
(Note 4)
WDF1 WDF2
(Note 1)
0
1
V10
CARRY
1
0
V11
Reload register R1 (8)
Timer 1 (8)
Register B
Register A
(T1AB)
(TAB1)
(Note 2)
T1F
SNZT1 instruction
Timer 1 underflow signal
(to port CARR)
Register A
Register A
Reload control circuit
(TAB2)
V22
Q
R
T
T2F
Register B
(T2AB)
Reload register R2L (8)
Timer 2(8)
Register B
(T2HAB)
Reload register R2H (8)
0
1
V20 (Note 1)
V21
0
1
(TAB2)
(T2AB)
CARRYD
(to port CARR)
T2F
V23
SNZT2
instruction
XIN
D
T
Q
R
V10
Carrier wave output control signal
V12
Port CARR
SCAR instruction
SQ
R
RCAR instruction
CAR flag
CARRY
(to timer 1)
Timer 1 underflow signal
(T2R2L)
(TAB1)
(Note 3)
1/2
Notes 1: Counting is stopped by clearing to “0.”
2: When the T1AB instruction is executed after V1 0 is set to “1,”
writing is performed only to reload register R1.
3: The data of reload register R2L set with the T2AB instruction
can be also written to timer 2 with the T2R2L instruction.
4: The initializing signal is output at reset or RAM back-up mode.



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