M38B53M4-059FP datasheet(45/355 Pages) MITSUBISHI

45 / 355 page

38B5 Group User’s Manual

1-29

HARDWARE

FUNCTIONAL DESCRIPTION

Fig. 22 Structure of serial I/O1 control registers 1, 2

P62/SRDY1 • P64/SBUSY1 pin control bits

0000: Pins P62 and P64 are I/O ports

0001: Not used

0010: P62 pin is an SRDY1 output, P64 pin is an I/O port.

0011: P62 pin is an SRDY1 output, P64 pin is an I/O port.

0100: P62 pin is an I/O port, P64 pin is an SBUSY1 input.

0101: P62 pin is an I/O port, P64 pin is an SBUSY1 input.

0110: P62 pin is an I/O port, P64 pin is an SBUSY1 output.

0111: P62 pin is an I/O port, P64 pin is an SBUSY1 output.

1000: P62 pin is an SRDY1 input, P64 pin is an SBUSY1 output.

1001: P62 pin is an SRDY1 input, P64 pin is an SBUSY1 output.

1010: P62 pin is an SRDY1 input, P64 pin is an SBUSY1 output.

1011: P62 pin is an SRDY1 input, P64 pin is an SBUSY1 output.

1100: P62 pin is an SRDY1 output, P64 pin is an SBUSY1 input.

1101: P62 pin is an SRDY1 output, P64 pin is an SBUSY1 input.

1110: P62 pin is an SRDY1 output, P64 pin is an SBUSY1 input.

1111: P62 pin is an SRDY1 output, P64 pin is an SBUSY1 input.

Serial I/O1 control register 2

(SIO1CON2 (SC12): address 001A 16)

P51/SOUT1 P-channel output disable bit

0: CMOS 3-state (P-channel output is valid.)

1: N-channel open-drain (P-channel output is invalid.)

SOUT1 pin control bit (at no-transfer serial data)

0: Output active

1: Output high-impedance

SBUSY1 output • SSTB1 output function selection bit

(Valid in automatic transfer mode)

0: Functions as each 1-byte signal

1: Functions as signal for all transfer data

Serial transfer status flag

0: Serial transfer completion

1: Serial transferring

Serial I/O1 control register 1

(SIO1CON1 (SC11):address 001916)

Serial I/O1 synchronous clock selection bits (P6 5/SSTB1 pin control bit)

00: Internal synchronous clock (P6 5 pin is an I/O port.)

01: External synchronous clock (P6 5 pin is an I/O port.)

10: Internal synchronous clock (P6 5 pin is an SSTB1 output.)

11: Internal synchronous clock (P6 5 pin is an SSTB1 output.)

Transfer mode selection bit

0: Full duplex (transmit and receive) mode (P5 0 pin is an SIN1 input.)

1: Transmit-only mode (P50 pin is an I/O port.)

Serial I/O initialization bit

0: Serial I/O initialization

1: Serial I/O enabled

Serial I/O1 clock pin selection bit

0:SCLK11 (P53/SCLK12 pin is an I/O port.)

1:SCLK12 (P52/SCLK11 pin is an I/O port.)

Transfer direction selection bit

0: LSB first

1: MSB first

Serial transfer selection bits

00: Serial I/O disabled (pins P62,P64,P65,and P50—P53 are I/O ports)

01: 8-bit serial I/O

10: Not available

11: Automatic transfer serial I/O (8-bits)

M38B53M4-059FP Datasheet(PDF) 45 Page - Mitsubishi Electric Semiconductor

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