Toshiba SD-2550A, Service Manual, Page: 86 / 109

3-27
Table 3-5-5 ZR36732 (4/5)
Function
SDRAM bidirectional data bus.
SDRAM address bus output.
SDRAM row selection (active: low) output.
SDRAM column selection (active: low)
output.
SDRAM clock output (same as internal
process clock).
SDRAM data masking (active: high) output.
SDRAM chip select (active: low) output.
Lower 2 Mbyte device.
SDRAM chip select (active: low) output.
Upper 2 Mbyte device.
SDRAM write enable (active: low) output.
Test pin. Connect to GNDP in normal use.
Test pin. Connect to GNDP in normal use.
Test pint Connect to VDDP in normal use.
GND for 3.3V digital power supply.
3.3V digital power supply.
Name
RAMDAT
[15:0]
RAMADD
[11:0]
RAMRAS#
RAMCAS#
PCLK
RAMDQM
RAMCS0#
RAMCS1#
RAMWE#
SCNENBL
TESTMODE
ICEMODE
GNDP
VDDP
TEST signal (3 pins).
SDRAM interface (35 pins)
Power supply signal (49 pins).
Pin
No.
68,
70,
72,
74
|
76,
78,
79,
81,
82,
84,
85,
87,
88,
90,
91
41,
42,
43,
45
|
48,
50,
51,
53
|
55
60
61
66
64
57
59
62
125
129
112
10,
40,
49,
56,
65,
69,
80,
86,
97,
128,
146
3,
16,
26,
38,
44,
52,
58,
67,
71,
77,
83,
89,
94,
98,
126,
135,
140
Table 3-5-5 ZR36732 (5/5)
Pin
No.
19,
99
132
130
14,
35,
73,
114,
144
63,
12,
33,
116,
142
123
121
104
101,
107,
109,
110
Function
3.3V digital power supply.
GND for PLL power supply of 3.3V AMCLK
generation.
PLL power supply for 3.3V AMCLK
generation.
GND for 1.8V digital power supply.
1.8V digital power supply.
GND for PLL power supply of 1.8V internal
clock generation.
PLL power supply for 1.8V internal clock
generation.
Analog power supply for 3.3V video DAC.
GND for analog power supply of 3.3V video
DAC.
Name
VDDIP
GNDAAM
VDDAAM
GNDC
VDDC
GNDA
VDDA
VDDD
GNDDAC
[D, B, P, S]