NEC V850E/RS1 User Manual page 410

(3) UARTAn control register 2 (UAnCTL2)
The UAnCTL2 register is used to select the baud rate (serial transfer rate) clock of UARTAn.
This register can be read or written in 8-bit units.
Reset input sets this register to FFH.
Symbol
UAnCTL2 UAnBRS7 UAnBRS6 UAnBRS5 UAnBRS4 UAnBRS3 UAnBRS2 UAnBRS1 UAnBRS0
Remark:
UAnBRS7 UAnBRS6 UAnBRS5 UAnBRS4 UAnBRS3 UAnBRS2 UAnBRS1 UAnBRS0
0
0
0
0
:
1
1
1
1
Remark:
Cautions: 1. This register can be rewritten only when the UAnPWR bit of the UAnCTL0 register
For details on the baud rate generator, please refer to section 12.6 "Dedicated Baud Rate Genera-
tor" on page 425.
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Chapter 12 Asynchronous Serial Interface A (UARTA)
Figure 12-4: UARTAn Control Register 2 (UAnCTL2) Format
Address: UA0CTL2: FFFFFA02H, UA1CTL2: FFFFFA12H
7 6 5
n = 0 to 1
0 0 0
0 0 0
0 0 0
0 0 0
: : :
1 1 1
1 1 1
1 0 1
1 1 1
f is the frequency of the base clock selected by the UAnCTL1 register.
XCLK
= 0 or when the UAnTXE bit = UAnRXE bit = 0.
2. The baud rate is the serial clock divided by two.
User's Manual U16702EE3V2UD00
4 3 2
0 0 –
0 1 0
0 1 0
0 1 1
: : :
1 1 0
1 1 0
1 1 1
1 1 1
Reset
1 0 Address R/W
R/W FFH
Rated
Serial clock
value (k)
– – Setting prohibited
f /4
0 4
XCLK
f /5
1 5
XCLK
f /6
0 6
XCLK
: : :
f /252
0 252
XCLK
f /253
1 253
XCLK
f /254
0 254
XCLK
f /255
1 255
XCLK
After