
Page 22
Epson Research and Development
Vancouver Design Center
SED1352
Hardware Functional Specification
X16-SP-001-16
Issue Date: 99/07/28
5 PINOUT DESCRIPTION
Key:
I
=
Input
O
=
Output
I/O
=
Bidirectional (Input/Output)
P
=
Power pin
COx
=
CMOS level output driver, x denotes driver type (see Table 6-4, “Output Specifications,” on page 27)
TSx
=
Tri-state CMOS level output driver, x denotes driver type (see Table 6-4, “Output Specifications,” on
page 27)
TSxD2
=
Tri-state CMOS level output driver with pull down resistor (typical values of 100K
Ω/200ΚΩ
at 5V/3.0V
respectively), x denotes driver type (see Table 6-4, “Output Specifications,” on page 27)
TTL
=
TTL level input (for VDD = 5.0V, (see Table 6-3, “Input Specifications,” on page 26 for VDD = 3.0V and
3.3V)
TTLS
=
TTL level input with hysteresis
Table 5-1: Bus Interface
Pin Name
Type F0B Pin #
F1B/D0B
Pin/Pad #
Driver
Description
DB0-DB15 I/O
94 - 100, 1,
4 -11
91 - 98,
1 - 8
TS2
These pins are connected to the system data bus. In 8-bit bus
mode, DB8-DB15 must be tied to V
DD
.
AB0
I
12
9
TTL
In MC68000 MPU interface, this pin is connected to the Upper
Data Strobe (UDS#) pin of MC68000. In other bus interfaces, this
pin is connected to the system address bus.
AB1-AB19 I
13 - 31
10 - 28
TTL
These pins are connected to the system address bus.
BHE#
I
91
88
TTLS
In MC68000 MPU interface, this pin is connected to the Lower
Data Strobe (LDS#) pin of MC68000. In other bus interfaces, this
pin is the Bus High Enable input for use with 16-bit system. In 8-
bit bus mode, tie BHE# input to V
DD
.
IOCS#
I
84
81
TTLS
Active low input to select one of fifteen internal registers.
IOW#
I
85
82
TTLS
In MC68000 MPU interface, this pin is connected to the R/W# pin
of MC68000. This input pin defines whether the data transfer is a
read (active high) or write (active low) cycle. In other bus
interfaces, this is the active low input to write data into an internal
register.
IOR#
I
86
83
TTLS
In MC68000 MPU interface, this pin is connected to the AS# pin
of MC68000. This input pin indicates a valid address is available
on the address bus. In other bus interfaces, this is the active low
input to read data from an internal register.
MEMCS#
I
87
84
TTLS
Active low input to indicate the attempt to access the display
memory.
MEMW#
I
88
85
TTLS
Active low input to write data to the display memory. This pin
should be tied to V
DD
in an MC68000 MPU interface.