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Section 10 Serial Communication Interface
Rev. 6.00 Sep 12, 2006 page 309 of 526
REJ09B0326-0600
Note: The value set in BRR is given by the following equation:
N =
×
10
6
– 1
OSC
(8
×
2
2n
×
B)
where
B:
Bit rate (bit/s)
N:
Baud rate generator BRR setting (0
≤
N
≤
255)
OSC: Value of
φ
OSC
(MHz)
n:
Baud rate generator input clock number (n = 0, 1, 2, or 3)
(The relation between n and the clock is shown in table 10.10.)
Table 10.10 Relation between n and Clock
SMR
Setting
n Clock CKS1
CKS0
0
φ
0
0
1
φ
/4 0 1
2
φ
16 1 0
3
φ
/64 1 1
10.3.3 Operation
SCI3 can perform serial communication in two modes: asynchronous mode in which
synchronization is provided character by character, and synchronous mode in which
synchronization is provided by clock pulses. The serial mode register (SMR) is used to select
asynchronous or synchronous mode and the data transfer format, as shown in table 10.11.
The clock source for SCI3 is determined by bit COM in SMR and bits CKE1 and CKE0 in SCR3,
as shown in table 10.12.
Asynchronous Mode
•
Choice of 7- or 8-bit data length
•
Choice of parity addition, multiprocessor bit addition, and addition of 1 or 2 stop bits. (The
combination of these parameters determines the data transfer format and the character length.)
•
Framing error (FER), parity error (PER), overrun error (OER), and break detection during
reception
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 ...