Pioneer PDP-5070PU, Service Manual

Page: 210 / 219

PDP-5071PU
210
1 2 3 4
1 2 3 4
C
D
F
A
B
E
Pin Function
2.15 Memory interface terminal
Acronyms Terminal number I/O Level Buffer type
PU/PD [k
Ω
]
Functions
SDRABP 4 O LVTTL
3-state
3 mA All bank pre-charge output for external memory
(Active-High)
SDRCLK 25 O LVTTL
3-state
9 mA Clock output for external memory
SDRCKE 21 O LVTTL
3-state
3 mA Clock enable output for external memory
(Active-High)
SDRCS 20 O LVTTL
3-state
3 mA Chip select output for external memory
(Active-Low)
SDRCAS 28 O LVTTL
3-state
3 mA Column address strobe output for external memory
(Active-Low)
SDRRAS 22 O LVTTL
3-state
3 mA Low address strobe output for external memory
(Active-Low)
SDRWE 29 O LVTTL
3-state
3 mA Write enable output for external memory
(Active-Low)
SDRA0
-SDRA11
19,18,15,14,
13,12,10,9,8,
7,6,5
O LVTTL
3-state
3 mA Address output for external memory
Insert a damping resistor of approximately 100
Ω
,
and connect to the SDRAM address terminal.
SDRDQ0
-SDRDQ15
51,49,46,42,
40,36,34,30,
31,35,37,41,
43,47,50,52
I/O LVTTL
3-state
6 mA Data input/output for external memory.