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HD64F2638F20J Datasheet, PDF (299/1512 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series
H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
Section 9 I/O Ports
9.4.2 Register Configuration
Table 9-6 shows the port 4 register configuration. Port 4 is an input-only port, and does not have a
data direction register or data register.
Table 9-6 Port 4 Registers
Name
Abbreviation
Port 4 register
PORT4
Note: * Lower 16 bits of the address.
R/W Initial Value
R
Undefined
Address*
H'FFB3
Port 4 Register (PORT4): The pin states are always read when a port 4 read is performed.
Bit
:
7
6
5
4
3
2
1
0
P47
P46
P45
P44
P43
P42
P41
P40
Initial value : —*
—*
—*
—*
—*
—*
—*
—*
R/W
:R
R
R
R
R
R
R
R
Note: * Determined by state of pins P47 to P40.
9.4.3 Pin Functions
Port 4 pins also function as A/D converter analog input pins (AN0 to AN7) and D/A converter
analog output pins (DA0 and DA1).
REJ09B0103-0800 Rev. 8.00
May 28, 2010
Page 249 of 1458