Hardware manual

Rev. 3.0, 09/98, page 122 of 361
Figures 6.9 (a) to 6.9 (e) show schematic diagrams of port 9.
P90
RP9
Reset
Internal data bus
Reset
WP9
WP9D
R
R
Q
Q
D
D
P90 DR
P90 DDR
C
C
WP9D:
WP9:
RP9:
Write Port 9 DDR
Write Port 9
Read Port 9
IRQ enable register
IRQ2 enable
A/D converter
module
ADTRG
IRQ2 input
Figure 6.9 (a) Port 9 Schematic Diagram (Pin P9
0
)