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7643 Datasheet(PDF) 320 Page - Renesas Technology Corp

Part # 7643
Description  8-BIT SINGLE-CHIP MICROCOMPUTER
PDF  424 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7643 Datasheet(HTML) 320 Page - Renesas Technology Corp

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Rev.2.00
Aug 28, 2006
page 199 of 202
7643 Group
REJ09B0133-0200
APPLICATION
2.10 Clock generating circuit
Fig. 2.10.13 Initial setting of relevant registers
Clock control register (address 1F16)
1
CCR
0
0 0 0
XIN division: f(XIN) (high-speed mode)
Timer 1 (address 2416)
T1
254
Set (Division ratio -1); 254 (FE16)
Timer 123 mode register (address 2916)
0
T123M
0
Timer 1 count: Operating
0
0
Timer 1 count source:
φ/8
Timer 2 count source: Timer 1 output
Interrupt request register B (address 0316)
0
IREQB
0
Set “0” to timer 1 interrupt request bit
Set “0” to timer 2 interrupt request bit
Interrupt control register B (address 0616)
ICONB
1
Timer 1 interrupt: Enabled
0
CPU mode register A (address 0016)
0
CPMA
0 0 1
XCIN-XCOUT oscillating
1
XIN-XOUT oscillating
External clock selected as internal system clock
f(XIN) selected as external clock; f(XCIN) selected at power failure
Timer 1, 2 write: Write value in latch and counter
0
Timer 2 interrupt: Disbled
b0
b7
b0
b7
b0
b7
b0
b7
b0
b7
b0
b7
0
0
0 0
0



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