Epson CMOS 32-Bit Single Chip Microcomputer S1C33L03 User Manual

III PERIPHERAL BLOCK: SERIAL INTERFACE
S1C33L03 FUNCTION PART EPSON B-III-8-39
A-1
B-III
SIF
SSCK0: Ch.0 input clock selection (D2) / Serial I/F Ch.0 control register (0x401E3)
SSCK1: Ch.1 input clock selection (D2) / Serial I/F Ch.1 control register (0x401E8)
SSCK2: Ch.2 input clock selection (D2) / Serial I/F Ch.2 control register (0x401F3)
SSCK3: Ch.3 input clock selection (D2) / Serial I/F Ch.3 control register (0x401F8)
Selects the clock source for an asynchronous transfer.
Write "1": #SCLK (external clock)
Write "0": Internal clock
Read: Valid
During operation in the asynchronous mode, this bit is used to select the clock source between an internal clock
(output by an 8-bit programmable timer) and an external clock (input from the #SCLKx pin). An external clock is
selected by writing "1" to this bit, and an internal clock is selected by writing "0".
At initial reset, SSCKx becomes indeterminate.
SMD01–SMD00: Ch.0 transfer mode selection (D[1:0]) / Serial I/F Ch.0 control register (0x401E3)
SMD11–SMD10: Ch.1 transfer mode selection (D[1:0]) / Serial I/F Ch.1 control register (0x401E8)
SMD21–SMD20: Ch.2 transfer mode selection (D[1:0]) / Serial I/F Ch.2 control register (0x401F3)
SMD31–SMD30: Ch.3 transfer mode selection (D[1:0]) / Serial I/F Ch.3 control register (0x401F8)
Sets the transfer mode of the serial interface as shown in Table 8.15 below.
Table 8.15 Setting of Transfer Mode
SMDx1 SMDx0 Transfer mode
118-bit asynchronous mode
107-bit asynchronous mode
01Clock-synchronized slave mode
00Clock-synchronized master mode
The SMDx bit can be read as well as written.
When using the IrDA interface, always be sure to set an asynchronous mode for the transfer mode.
At initial reset, SMDx becomes indeterminate.
DIVMD0: Sampling clock division ratio (D4) / Serial I/F Ch.0 IrDA register (0x401E4)
DIVMD1: Sampling clock division ratio (D4) / Serial I/F Ch.1 IrDA register (0x401E9)
DIVMD2: Sampling clock division ratio (D4) / Serial I/F Ch.2 IrDA register (0x401F4)
DIVMD3: Sampling clock division ratio (D4) / Serial I/F Ch.3 IrDA register (0x401F9)
Selects the division ratio of the sampling clock.
Write "1": 1/8
Write "0": 1/16
Read: Valid
Select the division ratio necessary to generate the sampling clock for asynchronous transfers. When DIVMDx is set
to "1", the sampling clock is generated from the input clock of the serial interface (output by an 8-bit
programmable timer or input from #SCLKx) by dividing it by 8. When DIVMDx is set to "0", the input clock is
divided by 16.
At initial reset, DIVMDx becomes indeterminate.

Epson CMOS 32-Bit Single Chip Microcomputer S1C33L03 Specifications

General

Brand	Epson
Model	CMOS 32-Bit Single Chip Microcomputer S1C33L03
Category	Computer Hardware
Language	English