Toshiba SD-2550A Service Manual page 86

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