Sio Block Diagram; Sio Prescaler Register (Siops); Sio Functional Block Diagram - Samsung S3C8275X User Manual

S3C8275X/F8275X/C8278X/F8278X/C8274X/F8274X
SIO PRE-SCALER REGISTER (SIOPS)
The prescaler register for serial I/O interface module, SIOPS, is located at E3H in set 1, bank 0.
The value stored in the SIO pre-scaler register, SIOPS, lets you determine the SIO clock rate (baud rate) as
follows:
Baud rate = Input clock (fxx/4)/(Prescaler value + 1), or SCK input clock.

SIO BLOCK DIAGRAM

SCK
SIOPS (E3H, set 1, bank 0)
fxx/2 8-bit P.S.
SI
SIO Pre-scaler Register (SIOPS)
E3H, Set 1, Bank 0, R/W
MSB .7 .6 .5
Baud rate = (f
Figure 14-2. SIO Prescaler Register (SIOPS)
SIOCON.7
M
U
1/2
X
Figure 14-3. SIO Functional Block Diagram
.4 .3 .2 .1
/4)/(SIOPS + 1)
XX
3-Bit Counter
Clear
CLK
SIOCON.3
SIOCON.4
(Edge Select)
CLK
8-Bit SIO Shift Buffer
(SIODATA, E2H, set 1, bank 0)
8
Data Bus
SERIAL I/O INTERFACE
.0 LSB
SIOCON.0
Pending
SIOCON.1
(Interrupt Enable)
SIOCON.2
(Shift Enable)
SIOCON.5
(Mode Select)
SIOCON.6
(LSB/MSB First
Mode Select)
SIO INT
SO
14-3