Toshiba TLCS-900/H1 Series Manual page 178

BR1CR Bit symbol
(120BH)
Read/Write
Reset State
Function Always
write "0".
+ (16 − K)/16 division enable
0 Disabled
1 Enabled
BR1ADD Bit symbol
(120CH)
Read/Write
Reset State
Function
Baud rate generator frequency divisor setting
BR1CR
<BR1S3:0>
BR1ADD
<BR1K3:0>
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 "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 BR1CR <BR1ADDE> to 1 after setting K (K = 1 to 15) to BR1ADD<BR1K3:0> when the +(16-K)/16 division
function is used. Writes to unused bits in the BR1ADD register do not affect operation, and undefined data is read from
these unused bits.
Figure 3.9.12 Baud Rate Generator Control (Channel 1, BR1CR, BR1ADD)
7 6 5
−
BR1ADDE BR1CK1
0 0 0
+ (16 − K)/16 00: φT0
division 01: φT2
10: φT8
0: Disable
11: φT32
1: Enable
Input clock selection for baud rate generator
00
01
10
11
7 6 5
BR1CR<BR1ADDE> = 1
0000 (N = 16) 0010 (N = 2)
or
0001 (N = 1) 1111 (N = 15)
Disable Disable
Divided by
Disable
N + (16 − K)/16
UART mode
○
×
92CH21-176
4 3
BR1CK0 BR1S3
R/W
0 0
Internal clock φT0
Internal clock φT2
Internal clock φT8
Internal clock φT32
4 3
BR1K3
0
BR1CR<BR1ADDE> = 0
0001 (N = 1) (Only UART)
to
to
1111 (N = 15)
0000 (N = 16)
Divided by N
I/O mode
×
×
TMP92CH21
2 1
BR1S2 BR1S1
0 0
Divided frequency setting
2 1
BR1K2 BR1K1
R/W
0 0
Set frequency divisor K
(divided by N + (16 − K)/16).
0
BR1S0
0
0
BR1K0
0
2009-06-19