NEC 78K0 Series User Manual page 378

f
PRS
f /2
PRS
2
f /2
PRS
3
f /2
PRS
4
f /2
PRS
5
f /2
PRS
6
f /2
PRS
7
f /2
PRS
8
f /2
PRS
9
f /2
PRS
10
f /2
PRS
8-bit timer/
event counter
50 output
CKSR6: TPS63 to TPS60
Remark POWER6: Bit 7 of asynchronous serial interface operation mode register 6 (ASIM6)
TXE6:
RXE6:
CKSR6:
BRGC6:
(2) Generation of serial clock
A serial clock to be generated can be specified by using clock selection register 6 (CKSR6) and baud rate
generator control register 6 (BRGC6).
The clock to be input to the 8-bit counter can be set by bits 3 to 0 (TPS63 to TPS60) of CKSR6 and the division
value (f /8 to f
XCLK6 XCLK6
TPS63 TPS62
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
378
CHAPTER 15 SERIAL INTERFACE UART6
Figure 15-24. Configuration of Baud Rate Generator
POWER6
Selector
f
XCLK6
Bit 6 of ASIM6
Bit 5 of ASIM6
Clock selection register 6
Baud rate generator control register 6
/255) of the 8-bit counter can be set by bits 7 to 0 (MDL67 to MDL60) of BRGC6.
Table 15-4. Set Value of TPS63 to TPS60
TPS61 TPS60
0 0
0 1
1 0
1 1
0 0
0 1
1 0
1 1
0 0
0 1
1 0
1 1
Preliminary User's Manual U17260EJ3V1UD
Baud rate generator
POWER6, TXE6 (or RXE6)
8-bit counter
Match detector
BRGC6: MDL67 to MDL60
Base Clock (f
f =
PRS
2 MHz 5 MHz
f 2 MHz 5 MHz
PRS
f /2 1 MHz 2.5 MHz
PRS
2
f /2 500 kHz 1.25 MHz
PRS
3
f /2 250 kHz 625 kHz
PRS
4
f /2 125 kHz 312.5 kHz 625 kHz
PRS
5
f /2 62.5 kHz 156.25 kHz 312.5 kHz 625 kHz
PRS
6
f /2 31.25 kHz 78.13 kHz 156.25 kHz 312.5 kHz
PRS
7
f /2 15.625 kHz 39.06 kHz 78.13 kHz 156.25 kHz
PRS
8
f /2 7.813 kHz 19.53 kHz 39.06 kHz 78.13 kHz
PRS
9
f /2 3.906 kHz 9.77 kHz
PRS
10
f /2 1.953 kHz 4.88 kHz
PRS
TM50 output
Setting prohibited
1/2 Baud rate
) Selection
XCLK6
f = f = f =
PRS PRS PRS
10 MHz 20 MHz
10 MHz 20 MHz
5 MHz 10 MHz
2.5 MHz 5 MHz
1.25 MHz 2.5 MHz
1.25 MHz
19.53 kHz 39.06 kHz
9.77 kHz 19.53 kHz