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R01UH0336EJ0102 Rev.1.02
Page 55 of 1538
Jul 17, 2014
V850E2/PG4-L
Section 2 Port Functions
2.3.3
Pin Data Input/Output Registers
(1)
PBDCn – Port Bi-Direction Control Register
This register enables the input buffer, thus the Pn_m pin level is always read
via PPRn.PPRn_m (n = 0 to 5, 8).
Access
Readable and writable in 16-bit units.
Address
Refer to Table 2-7, Port Group Configuration Registers
Initial value
0000
H
A reset from any source will initialize the bits.
Caution
To use the data-consistency checking function of the CSIG module, set the bit
in the PBDCn register that is allocated to the CSIGnSO pin to 1.
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
PBDC
n_15
PBDC
n_14
PBDC
n_13
PBDC
n_12
PBDC
n_11
PBDC
n_10
PBDC
n_9
PBDC
n_8
PBDC
n_7
PBDC
n_6
PBDC
n_5
PBDC
n_4
PBDC
n_3
PBDC
n_2
PBDC
n_1
PBDC
n_0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Table 2-17
PBDCn Register Contents
Bit Position
Bit Name
Function
15 to 0
PBDCn_[15:0]
Enables/disables bi-directional mode of the
corresponding pin.
0: Bi-directional mode disabled
1: Bi-directional mode enabled