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HD64F2145 Datasheet(PDF) 200 Page - Renesas Technology Corp

Part # HD64F2145
Description  Hitachi 16-Bit Single-Chip Microcomputer
PDF  829 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD64F2145 Datasheet(HTML) 200 Page - Renesas Technology Corp

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Rev. 2.0, 08/02, page 160 of 788
8.2
Port 1
Port 1 is an 8-bit I/O port. Port 1 pins also function as an address bus and PWM output pins. Port 1
functions change according to the operating mode. Port 1 has an on-chip input pull-up MOS
function that can be controlled by software. Port 1 has the following registers.
• Port 1 data direction register (P1DDR)
• Port 1 data register (P1DR)
• Port 1 pull-up MOS control register (P1PCR)
8.2.1
Port 1 Data Direction Register (P1DDR)
P1DDR specifies input or output for the pins of port 1 on a bit-by-bit basis.
Bit
Bit Name
Initial Value
R/W
Description
7
P17DDR
0
W
6
P16DDR
0
W
5
P15DDR
0
W
4
P14DDR
0
W
3
P13DDR
0
W
2
P12DDR
0
W
1
P11DDR
0
W
0
P10DDR
0
W
In mode 1:
Each pin of port 1 is address output regardless of
the set value of P1DDR.
In modes 2 and 3 (EXPE=1):
The corresponding port 1 pins are address output or
PWM output ports when P1DDR bits are set to 1,
and input ports when cleared to 0.
In modes 2 and 3 (EXPE=0):
The corresponding port 1 pins are output ports or
PWM outputs when the P1DDR bits are set to 1,
and input ports when cleared to 0.



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