Specifications
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9. CIRCUIT EXPLANATION
9-1. Block Diagram
(BN-20 only)
EL driver
DC/AC inverter
(BN-20 only)
EL
LCD
319 × 160 dots
Segment-TAB
(LSI4, 5)
Bias
generator
for LCD (IC708)
Electronic
contrast
adjustment
VLCO
POWER SUPPLY
V5EXT
V2SYS
V3SYS
V5SYS
AC Adapter
AD-A70140
34.5 kHz
Common-
TAB(LSI3)
Clock
KEYS
Buzzer
KI/KO
TX/RX
Clock
CPU
(LSI1)
10.14 MHz
32.768 kHz
Data bus
Gate array
(LSI2)
RX/TX
TX/RX
TX/RX
RX/TX
MODEM
BW-100
Line driver/receiver
(IC501)
TX/RX
TELEPHONE
RX/TX
MINI CRADLE
Personal computer
CPU/Gate array etc.
CPU
START BUTTON
RS-232C
Address bus
1 Mbits S-RAM
(LSI303)
16 Mbits
MASK ROM
(LSI301)
8 Mbits
FLASH ROM
(LSI304)
(BN-20 only)
8 Mbits
FLASH ROM
(LSI306)
8 Mbits
FLASH ROM
(LSI308)