NEC 78K0S/KA1+ Preliminary User's Manual page 184

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(4) Clock selection register 6 (CKSR6)
This register selects the base clock of serial interface UART6.
CKSR6 can be set by an 8-bit memory manipulation instruction.
Reset input clears this register to 00H.
Remark CKSR6 can be refreshed (the same value is written) by software during a communication operation
Address: FF96H After reset: 00H R/W
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Symbol
CKSR6
Caution Make sure POWER6 = 0 when rewriting TPS63 to TPS60.
Remarks 1. Figures in parentheses are for operation with f
2. f
184
CHAPTER 11 SERIAL INTERFACE UART6
(when bit 7 (POWER6) and bit 6 (TXE6) of ASIM6 = 1 or bit 7 (POWER6) and bit 5 (RXE6) of ASIM6
= 1).
Figure 11-8. Format of Clock Selection Register 6 (CKSR6)
7 6
0 0
TPS63 TPS62 TPS61
0 0
0 0
0 0
0 0
0 1
0 1
0 1
0 1
1 0
1 0
1 0
1 0
Other than above
: Oscillation frequency of clock to peripheral hardware
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Preliminary User's Manual U16898EJ1V0UD
5 4 3
0 0 TPS63
TPS60
0 0 f (10 MHz)
XP
0 1 f /2 (5 MHz)
XP
2
1 0 f /2 (2.5 MHz)
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3
1 1 f /2 (1.25 MHz)
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4
0 0 f /2 (625 kHz)
XP
5
0 1 f /2 (312.5 kHz)
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6
1 0 f /2 (156.25 kHz)
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7
1 1 f /2 (78.13 kHz)
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8
0 0 f /2 (39.06 kHz)
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9
0 1 f /2 (19.53 kHz)
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10
1 0 f /2 (9.77 kHz)
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11
1 1 f /2 (4.89 kHz)
XP
Setting prohibited
= 10 MHz
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2 1
TPS62 TPS61 TPS60
Base clock (f ) selection
XCLK6
0