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7545 Datasheet(PDF) 35 Page - Renesas Technology Corp

Part # 7545
Description  SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
PDF  62 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7545 Datasheet(HTML) 35 Page - Renesas Technology Corp

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Rev.1.06
Mar 07, 2008
Page 35 of 59
REJ03B0140-0106
7545 Group
Fig. 34 Timing diagram at reset
Fig. 35 Block diagram of watchdog timer and reset circuit
f(XIN)
f(XIN) 16384 pulses
RESET
Internal reset signal
CPU clock
φ
?
?
?FFFCFFFD
?
?
?
?
ADL
ADH
?
ADH, ADL
SYNC
Data
Address
Write "FF16" to
the watchdog timer
control register
XIN
Watchdog timer H count source selection bit
"0"
"1"
Watchdog timer H(8)
Reset circuit
Watchdog timer L(8)
Voltage drop detection circuit
Power-on reset circuit
Internal reset
1/16
STP instuction function selection bit
STP instruction
RESET
Write "FF16" to
the watchdog timer
control register
Count start
(Watchdog timer disable bit
(bit 0 of FSROM)



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