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Chapter 12
Serial Interface Function
Preliminary User’s Manual U14913EE1V0UM00
(4)
Clocked serial interface reception buffer registers L0, L1 (SIRBL0, SIRBL1)
The SIRBLn register is an 8-bit buffer register that stores receive data (n = 0, 1).
When the receive-only mode is set (TRMD bit of CSIMn register = 0), the reception operation is
started by reading data from the SIRBLn register.
These registers are read-only, in 8-bit units.
In addition to reset input, these registers can also be initialized by clearing (0) the CSIE bit of the
CSIMn register.
The SIRBLn register is the same as the lower bytes of the SIRBn register.
Figure 12-25: Clocked Serial Interface Reception Buffer Registers L0, L1 (SIRBL0, SIRBL1)
Cautions: 1. Read the SIRBLn register only when the 8-bit data length has been set (CCL bit of
CSIMn register = 0).
2. When the single transfer mode is set (AUTO bit of CSIMn register = 0), perform read
operation only in the idle state (CSOT bit of CSIMn register = 0). If the SIRBLn reg-
ister is read during data transfer, the data cannot be guaranteed.
7
6
5
4
3
2
1
0
Address
Initial
value
SIRBL0
SIRB7
SIRB6
SIRB5
SIRB4
SIRB3
SIRB2
SIRB1
SIRB0
FFFFF902H
00H
7
6
5
4
3
2
1
0
Address
Initial
value
SIRBL1
SIRB7
SIRB6
SIRB5
SIRB4
SIRB3
SIRB2
SIRB1
SIRB0
FFFFF912H
00H
Bit Position
Bit Name
Function
7 to 0
SIRB7 to
SIRB0
Stores receive data.
Содержание V850E/CA1 ATOMIC
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