Serial Mode Control Register 1 (Smc1) - Fujitsu Semiconductor Controller MB89950/950A Hardware Manual

10.4.1

Serial Mode Control Register 1 (SMC1)

Serial mode control register 1 (SMC1) sets synchronous mode, stop bit length, data
length, parity/non-parity and select the port function of SCK and SO.
I Serial mode control register 1 (SMC1)
Address Bit 7
0020 PEN
H
R/W
R/W : Readable and writable
: Initial value
: Unused
Figure 10.4-2 Serial mode control register 1 (SMC1)
Bit 6 Bit 5 Bit 4 Bit 3
SBL MC1 MC0 SMDE
R/W R/W R/W R/W
Bit 2 Bit 1 Bit 0 Initial value
SCKE SOE 00000-00
R/W R/W
SOE Serial output enable bit
0 Functions as general-purpose I/O port (P44)
1
Functions as serial output (SO)
SCKE Serial clock enable bit
Functions as general-purpose I/O port (P45).
0 When the port is set to input (DDR4:bit5 =0),
it also functions as serial clock input pin.
1 Functions as serial clock (SCK)
SMDE Operation mode control bit
0 Synchronous transfer
1 Asynchronous transfer
Transfer mode control bits
MC1 MC0
0 0
0 1
1 0
1 1
Value in parantheses is initial value and indicates the
data length with parity.
SBL Stop bit length control bit
0
1
Parity control bit
PEN
0
1 Parity (odd/even selected by TD8/TP bit)
CHAPTER 10 UART
B
Mode Data length
0 5(4)
1 8(7)
Reserved
9(8)
3
2-bit length
1-bit length
Non-parity
205