GMS81508B HYNIX [Hynix Semiconductor], GMS81508B Datasheet - Page 52

• Manufacturer Part Number: GMS81508B
• Description: HYUNDAI MICRO ELECTRONICS 8-BIT SINGLE-CHIP MICROCONTROLLERS
• Manufacturer: HYNIX [Hynix Semiconductor]

HYUNDAI MicroElectronics
Serial I/O Mode Register(SIOM) controls serial I/O func-
tion. According to SCK1 and SCK0, the internal clock or
external clock can be selected.
DEC. 1999 Ver 1.04
SIOR
SIOM
R/W
7
7
-
R/W R/W R/W R/W
6
Sending Data at Sending Mode
Receiving Data at Receiving Mode
SRDY
R/W
6
5
SM1
R/W
5
4
BTCL
SM0
3
R/W
4
R/W
Figure 13-2 SCI Control Register
BTCL
SCK1 SCK0
2
R/W
3
R/W R/W
1
R/W
2
0
SIOST
R/W
1
ADDRESS: 0EB
INITIAL VALUE: Undefined
SIOSF
R
0
Serial I/O Data Register(SIOR) is an 8-bit shift register.
First LSB is send or is received.
Serial transmission status bit
0: Serial transmission is in progress
1: Serial transmission is completed
Serial transmission start bit
Setting this bit starts an Serial transmission.
After one cycle, bit is cleared to “0” by hardware.
Serial transmission Clock selection
00: f
01: f
10: f
11: External Clock
Serial transmission Operation Mode
00: Normal Port(R52,R51,R50)
01: Sending Mode(SCLK,SOUT,R50)
10: Receiving Mode(SCLK,R51,SIN)
11: Sending & Receiving Mode(SCLK,SOUT,SIN)
R53/SRDY Selection
0: R53
1: SRDY
ADDRESS: 0EA
INITIAL VALUE: -000 0001
XIN
XIN
XIN
H
4
16
32
H
B
GMS81508B/16B/24B
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