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Section 10 Serial Communication Interface
Rev. 6.00 Sep 12, 2006 page 304 of 526
REJ09B0326-0600
Bit Rate Register (BRR)
Bit
7 6 5 4 3 2 1 0
BRR7 BRR6 BRR5 BRR4 BRR3 BRR2 BRR1 BRR0
Initial
value 1 1 1 1 1 1 1 1
Read/Write
R/W R/W R/W R/W R/W R/W R/W R/W
BRR is an 8-bit register that designates the transmit/receive bit rate in accordance with the baud
rate generator operating clock selected by bits CKS1 and CKS0 of the serial mode register (SMR).
BRR can be read or written by the CPU at any time.
BRR is initialized to H'FF upon reset, and in standby, watch, subactive, or subsleep mode.
Table 10.6 shows examples of BRR settings in asynchronous mode. The values shown are for
active (high-speed) mode.
Table 10.6 Examples of BRR Settings for Various Bit Rates (Asynchronous Mode)
OSC
(MHz)
2
2.4576
4
4.194304
Bit Rate
(bits/s)
n
N
Error
(%)
n
N
Error
(%)
n
N
Error
(%)
n
N
Error
(%)
110
1 70 +0.03
1 86 +0.31
1 141
+0.03
1 148
–0.04
150
0 207
+0.16
0 255
0
1 103
+0.16
1 108
+0.21
300
0 103
+0.16
0 127
0
0 207
+0.16
0 217
+0.21
600
0 51 +0.16
0 63 0
0 103
+0.16
0 108
+0.21
1200 0 25 +0.16
0 31 0
0 51 +0.16
0 54 –0.70
2400 0 12 +0.16
0 15 0
0 25 +0.16
0 26 +1.14
4800
0 7 0
0 12 +0.16
0 13 –2.48
9600
0 3 0
0 6 –2.48
19200
0 1 0
31250 0 0 0
0 1 0
38400
0 0 0
Summary of Contents for F-ZTAT H8/3642A Series
Page 6: ...Rev 6 00 Sep 12 2006 page iv of xx ...
Page 8: ...Rev 6 00 Sep 12 2006 page vi of xx ...
Page 22: ...Rev 6 00 Sep 12 2006 page xx of xx ...
Page 124: ...Section 5 Power Down Modes Rev 6 00 Sep 12 2006 page 102 of 526 REJ09B0326 0600 ...
Page 188: ...Section 6 ROM Rev 6 00 Sep 12 2006 page 166 of 526 REJ09B0326 0600 ...
Page 190: ...Section 7 RAM Rev 6 00 Sep 12 2006 page 168 of 526 REJ09B0326 0600 ...
Page 298: ...Section 9 Timers Rev 6 00 Sep 12 2006 page 276 of 526 REJ09B0326 0600 ...
Page 378: ...Section 12 A D Converter Rev 6 00 Sep 12 2006 page 356 of 526 REJ09B0326 0600 ...
Page 446: ...Section 13 Electrical Characteristics Rev 6 00 Sep 12 2006 page 424 of 526 REJ09B0326 0600 ...