4
SAM0487-031704
ESS Technology, Inc.
ES3890 PRODUCT BRIEF
ES3890 PIN DESCRIPTION
CAS#
62
O
Column Address Strobe to DRAM (active-low).
DRAS1#
63
O
Row Address Strobe 1 to DRAM (active-low).
VPP
64
P
5V power supply.
DRAS0#
67
O
Row Address Strobe 0 to DRAM (active-low).
DWE#
68
O
Write Enable to DRAM (active-low).
DOE#
69
O
Data Out Enable to DRAM (active-low).
MA9
O
Multiplexed memory row and column address.
MA[8:0]
70-78
O
Multiplexed memory row and column address.
DBUS[15:0]
79-94
I/O
Input when DRAM is being read. Output when DRAM is being written.
REST#
96
I
External system reset forces ES3890 to do a reset (active-low).
VSS_P
98
G
Ground for system PLL.
VCC_P
99
P
2.5V power supply for system PLL.
AUX2[0]
100
I/O
General-purpose programmable I/O. May be used for VFD clock.
AUX2[1]
101
I/O
General-purpose programmable I/O. May be used for Subcode-Q data.
AUX2[2]
102
I/O
General-purpose programmable I/O. May be used for Subcode-Q clock.
AUX2[3]
103
I/O
General-purpose programmable I/O.
AUX2[4]
104
I/O
General-purpose programmable I/O. May be used for C2PO error correction flag
from CDROM
AUX2[5]
105
I/O
General-purpose programmable I/O.
AUX2[6]
106
I/O
General-purpose programmable I/O. May be used for Subcode sync S0 or S1
detection.
AUX2[7]
107
I/O
General-purpose programmable I/O.
AUX1[5:0]
108-113
I/O
General-purpose programmable I/O.
AUX1[6]
114
I/O
General-purpose programmable I/O. May be used for VFD data output.
AUX1[7]
115
I/O
General-purpose programmable I/O. May be used for VFD data input.
AUX0[1:0]
118, 119
I/O
General-purpose programmable I/O.
AUX0[2]
120
I
General-purpose programmable input.
AUX0[4:3]
121, 122
I/O
General-purpose programmable I/O.
VSSV
123, 124
G
Ground for VDAC circuit.
VDAC
125
O
Video DAC V output. Connect to a 37.7
Ω resistor to ground for proper operation.
YDAC
126
O
Video DAC Y output. Connect to a 37.7
Ω resistor to ground for proper operation.
VCCV
127, 128
P
2.5V power supply for video DAC circuit.
Table 1
ES3890 Pin Description (Continued)
Names
Pin Numbers
I/O
Definitions
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