3069RF-ZTAT Datasheet, PDF (946/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

C.4 Port 4 Block Diagram
8-bit bus 16-bit bus
mode mode
Mode 7 ^Modes
1 to 5
Reset
R
Hardware
standby
RP4P
Q
D
P4 _n PCR
C
WP4P
Reset
R
Write to external
address
External bus
release
Q
D
P4 _nDDR
C
WP4D
Reset
R
P4n
Q
D
P4_n DR
C
WP4
RP4
Read external
address
[Legend]
WP4P: Write to P4PCR
RP4P: Read P4PCR
WP4D: Write to P4DDR
WP4: Write to port 4
RP4: Read port 4
n = 0 to 7
Figure C.4 Port 4 Block Diagram
Rev. 5.0, 09/04, page 924 of 978