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R01UH0336EJ0102 Rev.1.02
Page 1193 of 1538
Jul 17, 2014
V850E2/PG4-L
Section 21 Clocked Serial Interface G (CSIG)
(1)
CSIGnCTL0 - CSIG Control Register 0
This register controls the operation clock and enables/disables transmission
and reception.
Access
This register can be read/written in 1-bit and 8-bit units.
Address
<CSIGn_base1> + 00
H
Initial value
00
H
This register is initialized by a reset from any source.
Caution 1.
Do not modify CSIGnRXE or CSIGnTXE while CSIGnPWR = 0.
However, both bits can be modified in the same write operation when setting
CSIGnPWR = 1.
Caution 2. Do not modify CSIGnRXE or CSIGnTXE while a data transmission is pending
or ongoing, i.e. if CSIGnSTR0.CSIGnTSF = 1.
7
6
5
4
3
2
1
0
CSIGn
PWR
CSIGn
TXE
CSIGn
RXE
0
0
0
0
CSIGn
MBS
R/W
R/W
R/W
R
R
R
R
R/W
Table 21-9
CSIGnCTL0 Register Contents
Bit Position
Bit Name
Function
7
CSIGnPWR
Controls operation clock:
0: Stop operation clock
1: Provide operation clock
Clearing CSIGnPWR to 0 resets the internal circuits, stops operation, and sets
the CSIG to standby state. No clock is provided to internal circuits.
If CSIGnPWR is cleared during communication, ongoing communication is
aborted. A restart of the communication is then required.
6
CSIGnTXE
Enables/disables transmission:
0: Transmission disabled
1: Transmission enabled
5
CSIGnRXE
Enables/disables reception:
0: Reception disabled
1: Reception enabled
0
CSIGnMBS
Be sure to set this bit to 1 (the initial value is 0).