Rev. 1.0, 02/00, page 237 of 1141
10.9
Port 8
10.9.1
Overview
Port 8 is an 8-bit I/O port. Table 10.23 shows the port 8 configuration.
Port 8 consists of pins that are used both as standard-current I/O ports (P87 to P80) and an external
CTL signal input (EXCTL), a pre-amplifier output result signal input (COMP), color signal
outputs (R, G, and B), a pre-amplifier output selection signal output (H.Amp SW), a control signal
output for processing color signal (C.Rotary), a DPG signal input (DPG), a capstan external sync
signal input (EXCAP), an OSD character display position output (YB0), an OSD character data
output (YC0), and an external reference signal input (EXTTRG). It is switched by port mode
register 8 (PMR8), port mode register C (PMRC), and port control register 8 (PCR8).
Table 10.23 Port 8 Configuration
Port
Function
Alternative Function
P87 (standard I/O port)
DPG signal input
P86 (standard I/O port)
External reference signal input
Pre-amplifier output result signal input
P85 (standard I/O port)
Color signal output
Pre-amplifier output selection signal output
P84 (standard I/O port)
Color signal output
Control signal output for processing color signal
P83 (standard I/O port)
Color signal output
P82 (standard I/O port)
External CTL signal input
Capstan external sync signal input
P81 (standard I/O port)
OSD character display position output
Port 8
P80 (standard I/O port)
OSD character data output