em78f644nso28s ELAN Microelectronics Corp, em78f644nso28s Datasheet - Page 43

• Manufacturer Part Number: em78f644nso28s
• Description: Flash Series 8-bit Microcontroller
• Manufacturer: ELAN Microelectronics Corp

Product Specification (V1.0) 05.05.2010
(This specification is subject to change without further notice)
Bit 6 ~ Bit 5 (UMODE1 ~ UMODE0): UART mode select
Bit 4 ~ Bit 2 (BRATE2 ~ BRATE0): Transmit Baud Rate select
Bit 1 (UTBE): UART transfer buffer empty flag. Set to “1” when transfer buffer is
Bit 0 (TXE):
6.1.30 Bank 2 RB URC2 (UART Control 2)
Bits 7 ~ 6:
Bit 5 ~ Bit 4 (SBIM1 ~ SBIM0): Serial bus interface operating mode select
BRATE2
Bit 7
-
0
0
0
0
1
1
1
1
Bit 6
BRATE1
empty. Automatically reset to “0” when writing to the URTD register.
The UTBE bit will be cleared by hardware when transmission is
enabled. The UTBE bit is read-only. Therefore, writing to the URTD
register is necessary when you want to start shift transmission.
Enable transmission
0: Disable
1: Enable
Not used, set to “0” all the time.
-
UMODE1
0
0
1
1
0
0
1
1
SBIM1
For F642/542N, F641/541N, this register is reserved.
0
0
1
1
0
0
1
1
SBIM1
Bit 5
BRATE0
UMODE0
0
1
0
1
0
1
0
1
SBIM0
0
1
0
1
EM78F648/644/642/641/548/544/542/541N
0
1
0
1
SBIM0
Bit 4
Baud Rate
NOTE
Fc/104
Fc/208
Fc/416
Fc/13
Fc/26
Fc/52
TC3
UINVEN
Bit 3
Operating Mode
Mode 1: 7-bit
Mode 1: 8-bit
Mode 1: 9-bit
UART Mode
Reserved
Reserved
I/O mode
SPI mode
UART mode
Bit 2
4 MHz
19200
Reserved
9600
4800
2400
1200
600
-
−
8-Bit Microcontroller
Bit 1
-
8 MHz
38400
19200
9600
4800
2400
1200
−
Bit 0
-
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