Port Group 2 - NEC V850E/Dx3 Preliminary User's Manual

Pin Functions
Register Address
PM2
PMC2
PLCDC2
P2
PPR2
PDSC2
PICC2
PODC2
a)
µPD70(F)3420, µPD70(F)3421, µPD70(F)3422, µPD70F3423 only
Downloaded from Elcodis.com electronic components distributor

2.4.6 Port group 2

Port group 2 is an 8-bit port group. In alternative mode, it comprises pins for
the following functions:
• Timer TMG0 to TMG1 channels (TIG02 to TIG04, TIG11 to TIG14)
2
• I C1 data/clock line (SDA1, SCL1)
• LCD controller segment signal output (SEG0 to SEG7) (µPD70(F)3420,
µPD70(F)3421, µPD70(F)3422, µPD70F3423 only)
Port group 2 includes the following pins:
Table 2-26 Port group 2: pin functions and port types
Pin functions in different modes
Port mode
(PMCnm = 0)
Output mode
(PMnm = 0)
b
P20 (I/O) SDA1
b
P21 (I/O) SCL1
P22 (I/O) –
P23 (I/O) –
P24 (I/O) –
P25 (I/O) –
P26 (I/O) –
P27 (I/O) –
a)
µPD70(F)3420, µPD70(F)3421, µPD70(F)3422, µPD70F3423 only
b) 2
In I C function mode open drain emulation has to be enabled (PODC2.PODC20 = 1 and
PODC2.PODC21 = 1). Thus output function is enabled automatically, although PMnm = 1.
Note Alternative input functions of I
each. Thus you can select on which pin the alternative function should appear.
If alternative functions SDA1/SCL1 are used at P20/21 make sure to set also
PFSR0.PFSR05 = 0.
Refer to "Alternative input selection" on page 50.
Table 2-27 Port group 2: Configuration registers
Initial
Used bits
value
FFFF F424 FF PM27
H H
FFFF F444 00 PMC27
H H
a
FFFF F344 00 PLCDC27
H H
FFFF F404 00 P27
H H
FFFF F3C4 00 PPR27
H H
FFFF F304 00 PDSC27
H H
FFFF F384 00 PICC27
H H
FFFF F364 00 PODC27
H H
Access All 8-bit registers can be accessed in 8-bit or 1-bit units.
Preliminary User's Manual U17566EE1V2UM00
Alternative mode
(PMCnm = 1) (PLCDCnm = 1)
Input mode
(PMnm = 1)
SDA1 SEG0
TIG02/SCL1 SEG1
TIG03 SEG2
TIG04 SEG3
TIG11 SEG4
TIG12 SEG5
TIG13 SEG6
TIG14 SEG7
2
C1 (SDA1, SCL1) are provided on two pins
PM26 PM25 PM24
PMC26 PMC25 PMC24
PLCDC26 PLCDC25 PLCDC24
P26 P25 P24
PPR26 PPR25 PPR24
PDSC26 PDSC25 PDSC24
PICC26 PICC25 PICC24
PODC26 PODC25 PODC24
LCD mode
Pin function
a
after reset
a
P20 (I)
a
P21 (I)
a
P22 (I)
a
P23 (I)
a
P24 (I)
a
P25 (I)
a
P26 (I)
a
P27 (I)
PM23 PM22 PM21
PMC23 PMC22 PMC21
PLCDC23 PLCDC22 PLCDC21
P23 P22 P21
PPR23 PPR22 PPR21
PDSC23 PDSC22 PDSC21
PICC23 PICC22 PICC21
PODC23 PODC22 PODC21
Chapter 2
Port type
M
M
M
M
M
M
M
M
PM20
PMC20
PLCDC20
P20
PPR20
PDSC20
PICC20
PODC20
75