Pioneer DVR-210-S, Руководство по обслуживанию

Страница: 111 / 123

DVR-310-S
111
5 6 7 8
5 6
7
8
C
D
F
A
B
E
(a) Flash ROM interface pins
(6) External ROM connection pins
No. Pin Name I/O Function Active
196, 194-189,
186-178
D [15 : 0] I/O
External ROM data bus
Data bus in the external ROM access.
Process of pull-up or pull down is necessary.
−
175, 174, 172,
171, 169-167,
165-156
A [17 : 1] O
External ROM address bus
Address bus in the external ROM access.
Can addressing the 256k byte space.
−
176 RDZ O
ROM read
Strobe signal which shows a read cycle for external ROM.
It becomes the inactive in the idle state.
L
177 WRZ O
ROM write
Strobe signal which shows a write cycle for external ROM.
L
(b) EEPROM interface pins
No. Pin Name I/O Function Active
145 SO I/O Serial transmit data output of clock-synchronous system serial interface (CSI)
−
146 SI I/O Serial receive data input of clock-synchronous system serial interface (CSI)
−
147 SCK I/O Clock output of clock-synchronous system serial interface (CSI)
−
151 SCS I/O Chip select output of clock-synchronous system serial interface (CSI)
−
(7) Clock and reset pins
No. Pin Name I/O Function Active
1 RESETB I
Reset
RESETB input is asynchronous input. When a signal of fixed low-level width is input
without relation to an operation clock, take precedence of all operation, and reset the
system. Note: RESETB is low-active.
L
202 HS_CLK I
Host clock
Clock input pin which is supplied to CPU core and built-in peripheral I/O.
Please input 27 MHz clock. Perform 2 multiply with internal PLL by 27 MHz clock, 54
MHz clock is supplied to CPU core and internal peripheral I/O.
−