EPSON ActionNote 4000
System Board Components
Component
Description
CPU (U1)
486SLC/33 microprocessor: 1KB internal, two-way
set associative cache
BTC-5001 (U2)
BTC keyboard encoder&coder (70C40/77C82)
80C42/8742 (U4)
integrated, 8042 compatible, keyboard controller
DS 1287 or compatible
Dallas DS 1287 or compatible RTC; includes
RTC (U5)
Lithium backup battery and RAM
TH6460 (U7)
Peripheral controller; provides one printer parallel
port, two 16450 UARTS, IDE HDD interface, FDC,
bus interface buffers
DRAM (U13, U14,
4MB standard memory, 2MB soldered on main
U8, U9)
system board and one 2MB memory module;
expandable to 8MB by replacing the 2MB memory
module with a 8MB memory module (J5)
DB86082 (U10)
DataBook PCMCIA controller and driver interface
ACC 2036 (U12)
I module
System controller; provides AT bus control logic.
(U27, U28, U35)
ACC 2020 (U29)
AM27C010 (U30)
Power management controller
1024 Kb (128 Kb x 8) (OT) EPROM; VGA BIOS
ROM and Initialization BIOS ROM used during
power up; Databook Socket Services; supports
Buzzer (BZ1)
shadow
RAM
Internal
System Board Connectors
Connector
Keyboard or mouse (J1)
Description
6-pin, mini-DIN, female (back panel)
Cover switch (J2)
P-pin header, mate
Parallel port, printer/external FDD (J3) 25-pin, D-shell, female (back panel)
PCMCIA (J4)
Memory module (J5)
Serial port, COM1 (J6)
Keyboard ribbon cables (J7, J9)
68-pin header, male
44-pin header, female
9-pin, D-shell, male (back panel)
Ribbon terminators, 8-pin and 16-pin,
IDE HDD (J8)
respectively
50-pin edge connector; female,
External CRT VGA (J11)
CCFT inverter, LCD backlight,
supports HDD
15-pin female, back panel
12-pin header, male
brightness/contrast (J12)
I
LCD panel (J13)
B-pin header, male
LED (J14)
10-pin header, male
Trackball (J15)
4-pin header, male
Power supply, DC-DC converter (J16) 22-pin connector, female; supplies
power from the power supply to the
main system board
External Connector Pin Assignments
Parallel Port Connector (J3)
pin 13
pin 1
pin 14
Parallel Port Connector Pin Assignments
Pin
1
Signal
(Parallel)
/STROB
(Strobe)
Signal
Signal
(FDD)
Pin (Parallel)
Not connected 14 /AUTOFD
Signal
(FDD)
Reduce write
current
2
I Data 0
Index
15 /ERROR
Head select
3
I Data 1
Read data
16 /INlT
Direction
12
Paper end
13 SLCT
Write data
Ground
Ground
I Write enable
I
I
Serial Port Connector (J6)
Serial Port Connector Pin Assignments
Keyboard/Mouse Connector CJ1)
pin 6
pin 5
pin 4
pin 3
pin 2
pin 1
Keyboard/Mouse Connector Pin Assignments
Pin
Signal
Pin
Signal
1
Mouse data
4
+5 VCC
2
Keyboard data
5
Clock, mouse
3
Ground
6
Clock, keyboard
ActionNote 4000-4
7/27/93
