SH7708 Datasheet, PDF (409/625 Pages) Renesas Technology Corp – SuperH™ RISC engine

14.1.3 Pin Configuration
Table 14.1 summarizes the smart card interface pins.
Table 14.1 SCI Pins
Pin Name
Serial clock pin
Receive data pin
Transmit data pin
AbbreviationInput/Output Function
SCK
Output
Clock output
RxD
Input
Receive data input
TxD
Output
Transmit data output
14.1.4 Register Configuration
Table 14.2 summarizes the registers used by the smart card interface. The SCSMR, SCBRR,
SCSCR, SCTDR, and SCRDR registers are the same as in the ordinary SCI function. They
are described in section 13, Serial Communication Interface.
Table 14.2 Registers
Name
AbbreviationR/W Initial
Value*³
Address
Serial mode register
SCSMR
R/W H'00
H'FFFFFE80
Bit rate register
SCBRR
R/W H'FF
H'FFFFFE82
Serial control register SCSCR
R/W H'00
H'FFFFFE84
Transmit data register SCTDR
R/W H'FF
H'FFFFFE86
Serial status register
SCSSR
R/(W)*¹ H'84
H'FFFFFE88
Receive data register SCRDR
R
H'00
H'FFFFFE8A
Smart card mode register SCSCMR
R/W *²
H'FFFFFE8C
Notes: 1. Only 0 can be written, to clear the flags.
2. Bits 0, 2, and 3 are cleared. The value of the other bits is undefined.
3. Initialized by a power-on or manual reset.
Access Size
8
8
8
8
8
8
8
14.2 Register Descriptions
This section describes the registers added for the smart card interface and the bits whose
functions are changed.
395