HD64F38602R Datasheet, PDF (328/552 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

Section 15 Synchronous Serial Communication Unit (SSU)
15.4.4 Communication Modes and Pin Functions
The SSU switches functions of the input/output pin in each communication mode according to the
settings of the MSS bit in SSCRH and the RE and TE bits in SSER. Figure 15.2 shows the
relationship between communication modes and the input/output pins. In bidirectional
communication mode, neither TE nor RE should be set to 1.
Table 15.2 Relationship between Communication Modes and Input/Output Pins
Communication
Mode
Clocked
Synchronous
Communication
Mode
Register State
SSUMS BIDE MSS TE
0
x
0
0
1
1
0
1
Four-Line Bus
1
Communication
Mode
0
0
0
1
1
0
1
Four-Line Bus
1
(Bidirectional)
Communication
Mode
1
0
0
1
1
0
1
[Legend] x: Don't care.
: Can be used as a general I/O port.
Pin State
RE
SSI SSO SSCK
1
In

In
0

Out In
1
In
Out In
1
In

Out
0

Out Out
1
In
Out Out
1

In
In
0
Out 
In
1
Out In
In
1
In

Out
0

Out Out
1
In
Out Out
1

In
In
0

Out In
1

In
Out
0

Out Out
Rev. 3.00 May 15, 2007 Page 296 of 516
REJ09B0152-0300