HD64F3026X25 Renesas Electronics America, HD64F3026X25 Datasheet - Page 205

• Manufacturer Part Number: HD64F3026X25
• Description: MCU 3V 256K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of HD64F3026X25

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

7.5.2
Table 7.6 summarizes the registers of port 4.
Table 7.6
Address *
H'EE003
H'FFFD3
H'EE03E
Note: * Lower 20 bits of the address in advanced mode.
Port 4 Data Direction Register (P4DDR): P4DDR is an 8-bit write-only register that can select
input or output for each pin in port 4.
P4DDR is a write-only register. Its value cannot be read. All bits return 1 when read.
P4DDR is initialized to H'00 by a reset and in hardware standby mode. In software standby mode
it retains its previous setting.
Bit
Initial value
Read/Write
Modes 1 to 5 (Expanded Modes)
When all areas are designated as 8-bit-access areas by the bus controller’s bus width control
register (ABWCR), selecting 8-bit bus mode, port 4 functions as an input/output port. In this
case, a pin in port 4 becomes an output port if the corresponding P4DDR bit is set to 1, and an
input port if this bit is cleared to 0.
When at least one area is designated as a 16-bit-access area, selecting 16-bit bus mode, port 4
functions as part of the data bus, regardless of the P4DDR settings.
Modes 6 and 7 (Single-Chip Mode)
Port 4 functions as an input/output port. A pin in port 4 becomes an output port if the
corresponding P4DDR bit is set to 1, and an input port if this bit is cleared to 0.
Register Descriptions
Port 4 Registers
Name
Port 4 data direction register
Port 4 data register
Port 4 input pull-up MOS control
register
P4 DDR
7
W
7
0
P4 DDR
6
W
6
0
P4 DDR
5
W
5
0
Port 4 data direction 7 to 0
These bits select input or output for port 4 pins
P4 DDR
4
W
4
0
Abbreviation
P4DDR
P4DR
P4PCR
Rev. 2.00 Sep 20, 2005 page 165 of 800
P4 DDR
3
W
3
0
P4 DDR
2
W
2
0
R/W
W
R/W
R/W
P4 DDR
Section 7 I/O Ports
REJ09B0260-0200
1
W
1
0
Initial Value
H'00
H'00
H'00
P4 DDR
0
W
0
0