Port Group 14 (Μpd70F3427 Only) - NEC V850E/Dx3 Preliminary User's Manual

Chapter 2
Register
PM14
PMC14
P14
PPR14
a)
PMC143 specifies the data bus width of the external memory interface:
- PMC143 = 0: 16-bit data bus D[15:0], D[31:16] pins of port groups 3, 8, 9, 10 operate in port/alternative mode
- PMC143 = 1: 32-bit data bus D[31:0], D[31:16] pins of port groups 3, 8, 9, 10 operate as data bus pins
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2.4.18 Port group 14 (µPD70F3427 only)
Port group 14 is a 3-bit port group. In alternative mode, it comprises pins for
the following functions:
• External memory interface bus clock BCLK
• External memory interface byte enable signals BE2, BE3
Port group 14 includes the following pins:
Table 2-50 Port group 14: pin functions and port types
Pin functions in different modes
Port mode
(PMCnm = 0)
P140 (I/O)
P141 (I/O)
P142 (I/O)
Table 2-51 Port group 14: configuration registers
Initial
Address Used bits
value
FFFF F43C FF X
H H
FFFF F45C 00 X
H H
FFFF F41C 00 X
H H
FFFF F3DC 00 X
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)
Output mode Input mode
(PMnm = 0) (PMnm = 1)
BCLK –
BE2 –
BE3 –
X X X X
X X X PMC143
X X X X
X X X X
Pin Functions
Pin function
Port type
after reset
P140 (I) M
P141 (I) M
P142 (I) M
PM142 PM141 PM140
a
PMC142 PMC141 PMC140
P142 P141 P140
PPR142 PPR141 PPR140