M66014FP

REJ03F0265-0200 Rev.2.00 Mar 18, 2008

Page 3 of 4

Serial Data Input/Output Operation

A cycle of 16-bit serial output data setting and serial data communication starts with a write access given by

microcomputer to transmission shift registers in M66014.

are output in series in this order. Output of each data starts from its most significant bit.

At the

CS rise edge, busy flag in M66014 is set, and OE output shifts from "H" to "L". Shift clock SCLK and serial data

SOUT are then output.

At SCLK fall edges, serial output shift register executes shifting operation, and data on shift register is output in series

from pin SOUT. Serial input data from pin SIN is taken into input shift register at SCLK rise edges.

After the SCLK 16T rise edge, the status of SOUT and

OE shifts to "H" after one bit's delay of SCLK, and busy flag is

reset. When interrupt output is being set to enable, INT output is set.

Remarks

(1) If

CS rises after write operation is executed on SR

detection of

CS rise. However, if a read access is given after data is written on SR

SRL

write operation

Serial communication period

INT

1T

2T

8T

9T

16T

SCLK

SOUT

SIN

Busy flag

(in M66014)

CS

OE

Figure 1 Serial Communication Timing Chart