NEC PD78052 - Page 449

449
CHAPTER 19 SERIAL INTERFACE CHANNEL 2
Figure 19-6. Baud Rate Generator Control Register Format (2/2)
5-Bit Counter Source Clock Selection
TPS3 TPS2 TPS1 TPS0 n
MCS = 1 MCS = 0
0000fXX/2
10
fXX/2
10
(4.9 kHz) fX/2
11
(2.4 kHz) 11
0101fXX fX (5.0 MHz) fX/2 (2.5 MHz) 1
0110fXX/2 fX/2 (2.5 MHz) fX/2
2
(1.25 MHz) 2
0111fXX/2
2
fX/2
2
(1.25 MHz) fX/2
3
(625 kHz) 3
1000fXX/2
3
fX/2
3
(625 kHz) fX/2
4
(313 kHz) 4
1001fXX/2
4
fX/2
4
(313 kHz) fX/2
5
(156 kHz) 5
1010fXX/2
5
fX/2
5
(156 kHz) fX/2
6
(78.1 kHz) 6
1011fXX/2
6
fX/2
6
(78.1 kHz) fX/2
7
(39.1 kHz) 7
1100fXX/2
7
fX/2
7
(39.1 kHz) fX/2
8
(19.5 kHz) 8
1101fXX/2
8
fX/2
8
(19.5 kHz) fX/2
9
(9.8 kHz) 9
1110fXX/2
9
fX/2
9
(9.8 kHz) fX/2
10
(4.9 kHz) 10
Other than above Setting prohibited
Caution When data is written to BRGC during a communication operation, baud rate generator output
is disrupted and communication cannot be performed normally. Therefore, data must not
be written to BRGC during a communication operation.
Remarks 1. f
X : Main system clock oscillation frequency
2. fXX : Main system clock frequency (fX or fX/2)
3. MCS : Oscillation mode selection register (OSMS) bit 0
4. n : Value set in TPS0 to TPS3 (1 ≤ n ≤ 11)
5. Figures in parentheses apply to operation with f
X = 5.0 MHz