HD6473258F10V Datasheet, PDF (93/301 Pages) Renesas Technology Corp – Hitachi Single-Chip Microcomputer

Hardware standby
Mode 3
P2n
Mode 1 or 2
Mode 1 Reset
SR
Q
D
P2nDDR
C*
WP2D
Reset
R
Q
D
P2nDR
C
WP2
RP2
WP2D: Write Port 2 DDR
WP2: Write Port 2
RP2: Read Port 2
n = 0 to7
* Set-priority
Figure 5-2. Port 2 Schematic Diagram
5.4 Port 3
Port 3 is an 8-bit input/output port that also provides the external data bus and data pins for the
parallel handshaking interface. The function of port 3 depends on the MCU mode as indicated in
table 5-6. For further information on parallel handshaking, see section 6, Par^Faⁱl^gle^ul^reH⁵a^-n²dshaking
Interface.
Table 5-6. Functions of Port 3
Mode 1
Data bus
Mode 2
Data bus
Mode 3
General-purpose input/output port or parallel handshaking port
Pins of port 3 can drive a single TTL load and a 90-pF capacitive load when they are used as output
84