US38024-BAG1 Renesas Electronics America, US38024-BAG1 Datasheet - Page 262

• Manufacturer Part Number: US38024-BAG1
• Description: DEV EVALUATION KIT H8/38024
• Manufacturer: Renesas Electronics America
• Series: H8®r
• Type: MCUr

Specifications of US38024-BAG1

• Contents: 2G (Second-generation) Evaluation Board, HEW debugger support, Cable and CD-ROM
• For Use With/related Products: H8/38024
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Section 8 I/O Ports
Port Data Register B (PDRB)
Reading PDRB always gives the pin states. However, if a port B pin is selected as an analog input
channel for the A/D converter by AMR bits CH3 to CH0, that pin reads 0 regardless of the input
voltage.
Port Mode Register B (PMRB)
PMRB is an 8-bit read/write register controlling the selection of the PB
PMRB is initialized to H'F7.
Bits 7 to 4 and 2 to 0—Reserved
Bits 7 to 4 and 2 to 0 are reserved; they are always read as 1 and cannot be modified.
Bit 3—PB
These bits select whether pin PB
Bit 3
IRQ1
0
1
Note: Rising or falling edge sensing can be selected for the IRQ
For TMIC pin setting information, see the Timer More Register C (TMC) description in section
9.3.2, Register Descriptions.
Rev. 8.00 Mar. 09, 2010 Page 240 of 658
REJ09B0042-0800
Bit
Read/Write
Bit
Initial value
Read/Write
3
/AN
Description
Functions as PB
Functions as IRQ
3
/IRQ
PB
⎯
⎯
R
7
7
1
1
7
Pin Function Switch (IRQ1)
PB
3
⎯
⎯
R
/AN
6
6
1
1
/TMIC input pin
3
6
/AN
3
input pin
3
/IRQ
PB
⎯
⎯
R
5
5
1
5
1
is used as PB
PB
⎯
⎯
R
4
4
1
4
3
IRQ1
/AN
PB
R/W
R
3
3
0
3
3
or as IRQ
1
/TMIC pin.
PB
⎯
⎯
R
2
2
1
3
2
pin function. Upon reset,
1
/TMIC.
PB
⎯
⎯
R
1
1
1
1
(initial value)
PB
⎯
⎯
R
0
0
1
0