Communication Modes And Pin Functions; Table 14.4 Communication Modes And Pin States Of Ssi And Sso Pins - Renesas H8SX/1520 Series Hardware Manual

Section 14 Synchronous Serial Communication Unit (SSU)
14.4.4

Communication Modes and Pin Functions

The SSU switches the input/output pin (SSI, SSO, SSCK, and SCS) functions according to the
communication modes and register settings. When a pin is used as an input pin, set the
corresponding bit in the input buffer control register (ICR) to 1. The relationship of
communication modes and input/output pin functions are shown in tables 14.2 to 14.4.

Table 14.4 Communication Modes and Pin States of SSI and SSO Pins

Communication
Mode
SSU communication
mode
SSU (bidirectional)
communication mode
Clock synchronous
communication mode
[Legend]
: Not used as SSU pin (can be used as I/O port)
Rev. 3.00 Mar. 14, 2006 Page 528 of 804
REJ09B0104-0300
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Register Setting
SSUMS BIDE MSS
0 0 0
1
0 1 0
1
1 0 0
1
TE RE SSI

0 1
1 0 Output
1 Output
0 1 Input

1 0
1 Input

0 1

1 0

0 1

1 0
0 1 Input

1 0
1 Input
0 1 Input

1 0
1 Input
Pin State
SSO
Input

Input

Output
Output
Input
Output
Input
Output

Output
Output

Output
Output