Toshiba TLCS-900/H1 Series Manual page 177

BR0CR Bit symbol
(1203H)
Read/Write
Reset State
Function Always
write "0".
+(16 − K)/16 division enable
0 Disable
1 Enable
BR0ADD Bit symbol
(1204H)
Read/Write
Reset State
Function
Sets baud rate generator frequency divisor
BR0CR
<BR0S3:0>
BR0ADD
<BR0K3:0>
0000
0001 (K = 1)
to
1111 (K = 15)
Note1:Availability of +(16-K)/16 division function
N
2 to 15
1 , 16
The baud rate generator can be set to "1" in UART mode only when the +(16-K)/16 division function is not used. Do not
use in I/O interface mode.
Note2:Set BR0CR <BR0ADDE> to 1 after setting K (K = 1 to 15) to BR0ADD<BR0K3:0> when +(16-K)/16 division function is
used. Writes to unused bits in the BR0ADD register do not affect operation, and undefined data is read from these
unused bits.
Figure 3.9.11 Baud Rate Generator Control (Channel 0, BR0CR, BR0ADD)
7 6 5
−
BR0ADDE BR0CK1
0 0 0
+(16 − K)/16 00: φT0
division 01: φT2
0: Disable
10: φT8
1: Enable
11: φT32
Setting the input clock of baud rate generator
00
01
10
11
7 6 5
BR0CR<BR0ADDE> = 1
0000 (N = 16) 0010 (N = 2)
or to
0001 (N = 1) 1111 (N = 15)
Disable Disable
Divided by
Disable
N + (16 − K)/16
UART mode
○
×
92CH21-175
4 3
BR0CK0 BR0S3
R/W
0 0
Internal clock φT0
Internal clock φT2
Internal clock φT8
Internal clock φT32
4 3
BR0K3
0
BR0CR<BR0ADDE> = 0
0001 (N = 1) (Only UART)
to
1111 (N = 15)
0000 (N = 16)
Divided by N
I/O mode
×
×
TMP92CH21
2 1
BR0S2 BR0S1
0 0
Divided frequency setting
2 1
BR0K2 BR0K1
R/W
0 0
Sets frequency divisor "K"
(divided by N + (16 − K)/16).
0
BR0S0
0
0
BR0K0
0
2009-06-19