178
CHAPTER 13 SERIAL INTERFACE UART
Preliminary User’s Manual U14581EJ3V0UM00
(c) Baud rate generator control register (BRGC)
BRGC is set with an 8-bit memory manipulation instruction.
RESET input clears BRGC to 00H.
Address: FF87H After Reset: 00H R/W
Symbol
7
6
5
4
3
2
1
0
BRGC
0
TPS2
TPS1
TPS0
MDL3
MDL2
MDL1
MDL0
(f
X
= 8.38 MHz)
TPS2
TPS1
TPS0
Source Clock Selection for 5-bit Counter
n
0
0
0
f
X
/2
1
0
0
1
f
X
/2
2
2
0
1
0
f
X
/2
3
3
0
1
1
f
X
/2
4
4
1
0
0
f
X
/2
5
5
1
0
1
f
X
/2
6
6
1
1
0
f
X
/2
7
7
1
1
1
f
X
/2
8
8
MDL3
MDL2
MDL1
MDL0
Input Clock Selection for Baud Rate Generator
k
0
0
0
0
f
SCK
/16
0
0
0
0
1
f
SCK
/17
1
0
0
1
0
f
SCK
/18
2
0
0
1
1
f
SCK
/19
3
0
1
0
0
f
SCK
/20
4
0
1
0
1
f
SCK
/21
5
0
1
1
0
f
SCK
/22
6
0
1
1
1
f
SCK
/23
7
1
0
0
0
f
SCK
/24
8
1
0
0
1
f
SCK
/25
9
1
0
1
0
f
SCK
/26
10
1
0
1
1
f
SCK
/27
11
1
1
0
0
f
SCK
/28
12
1
1
0
1
f
SCK
/29
13
1
1
1
0
f
SCK
/30
14
1
1
1
1
Setting prohibited
—
Cautions 1. Writing to BRGC during a communication operation may cause abnormal output
from the baud rate generator and disable further communication operations. Therefore,
do not write to BRGC during a communication operation.
2. Bit 7 must be set to 0.
Remarks 1. f
X
:
Main system clock oscillation frequency
2. f
SCK
: Source clock for 5-bit counter
3. n:
Value set via TPS0 to TPS2 (1
≤
n
≤
8)
4. k:
Value set via MDL0 to MDL3 (0
≤
k
≤
14)
Содержание mPD780851
Страница 2: ...2 Preliminary User s Manual U14581EJ3V0UM00 MEMO ...
Страница 8: ...8 Preliminary User s Manual U14581EJ3V0UM00 MEMO ...
Страница 12: ...12 Preliminary User s Manual U14581EJ3V0UM00 MEMO ...
Страница 26: ...26 Preliminary User s Manual U14581EJ3V0UM00 MEMO ...
Страница 46: ...46 Preliminary User s Manual U14581EJ3V0UM00 MEMO ...
Страница 74: ...74 Preliminary User s Manual U14581EJ3V0UM00 MEMO ...
Страница 90: ...90 Preliminary User s Manual U14581EJ3V0UM00 MEMO ...
Страница 100: ...100 Preliminary User s Manual U14581EJ3V0UM00 MEMO ...
Страница 136: ...136 Preliminary User s Manual U14581EJ3V0UM00 MEMO ...
Страница 142: ...142 Preliminary User s Manual U14581EJ3V0UM00 MEMO ...
Страница 186: ...186 Preliminary User s Manual U14581EJ3V0UM00 MEMO ...
Страница 222: ...222 Preliminary User s Manual U14581EJ3V0UM00 MEMO ...
Страница 230: ...230 Preliminary User s Manual U14581EJ3V0UM00 MEMO ...
Страница 240: ...240 Preliminary User s Manual U14581EJ3V0UM00 MEMO ...
Страница 262: ...262 Preliminary User s Manual U14581EJ3V0UM00 MEMO ...
Страница 296: ...296 Preliminary User s Manual U14581EJ3V0UM00 MEMO ...
Страница 304: ...304 Preliminary User s Manual U14581EJ3V0UM00 MEMO ...
Страница 314: ...314 Preliminary User s Manual U14581EJ3V0UM00 MEMO ...