Serial Mode Control Register 2 (Smc2) - Fujitsu Semiconductor Controller MB89950/950A Hardware Manual

10.4.6

Serial Mode Control Register 2 (SMC2)

Serial mode control register 2 (SMC2) selects the division ratio of the baud rate
generator, selects to function as UART or SIO, and enables the baud rate generator.
I Serial mode control register 2 (SMC2)
Address Bit 7
0024
H
R/W : Readable and writable
: Initial value
: Unused
Figure 10.4-7 Serial mode control register 2 (SMC2)
Bit 6 Bit 5 Bit 4 Bit 3
PSEN RESV RSEL
R/W R/W R/W
Bit 2 Bit 1 Bit 0 Initial value
PDS1 PDS0 --1-0-00
R/W R/W
PDS1 PDS0 Input clock divider selection bits
0 0
0 1
1 0
1 1
RSEL UART/SIO selection bit
0
1
Reserved bit
Always write "0"
Baud rate generator enable bit
PSEN
Stops baud rate generator
0
1 Starts baud rate
CHAPTER 10 UART
B
Divided by 4
Divided by 6
Divided by 13
Divided by 65
Function as UART
Function as SIO
generator
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