UPD78F9234MC-5A4-A Datasheet, PDF (195/419 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

CHAPTER 11 SERIAL INTERFACE UART6
(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 signal generation clears this register to 00H.
Remark CKSR6 can be refreshed (the same value is written) by software during a communication operation
(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)
Address: FF96H After reset: 00H R/W
Symbol
7
6
5
CKSR6
0
0
0
4
3
2
1
0
0
TPS63
TPS62
TPS61
TPS60
TPS63
0
0
0
0
0
0
0
0
1
1
1
1
TPS62
TPS61
0
0
0
0
0
1
0
1
1
0
1
0
1
1
1
1
0
0
0
0
0
1
0
1
Other than above
TPS60
0
1
0
1
0
1
0
1
0
1
0
1
Base clock (fXCLK6) selection
fXP (10 MHz)
fXP/2 (5 MHz)
fXP/2² (2.5 MHz)
fXP/2³ (1.25 MHz)
fXP/2⁴ (625 kHz)
fXP/2⁵ (312.5 kHz)
fXP/2⁶ (156.25 kHz)
fXP/2⁷ (78.13 kHz)
fXP/2⁸ (39.06 kHz)
fXP/2⁹ (19.53 kHz)
fXP/2¹⁰ (9.77 kHz)
fXP/2¹¹ (4.89 kHz)
Setting prohibited
Caution Make sure POWER6 = 0 when rewriting TPS63 to TPS60.
Remarks 1. Figures in parentheses are for operation with fXP = 10 MHz
2. fXP: Oscillation frequency of clock to peripheral hardware
User’s Manual U17446EJ5V0UD
193