Furuno HS-8800 User Manual

5.4 Block Description
5-27
5.4.7 HS CONT (05P0781)
CPU on HS CONT board responds to the polling from the Transceiver unit and sends
out the information. For example, handset is OFF HOOK etc.
CPU on the Transceiver unit responds to it and carries out appropriate actions and sends
a command to the Remote Handset CPU at the time of responding. Remote Handset
CPU will carry out a command from the Transceiver unit and displays it.
U14 (EEROM) on HS CONT board stores ID number, dimmer, and contrast of a
Remote Handset.
Fig 5.4.22 HS CONT Block Diagram
CPU
(HD64F3067RF)
Flash ROM:128k
RAM:4k
UART:3ch
ICU:6ch
PIO:79
Loudspeaker
(Handfree)
LCD
Module
SW PCB
DIM Cont. 3bits
Scan out 3bits
Scan in 8bits
2bits
Key click tone
MFM07Q10
18.432MHz
U2
Y1
U12
Hook senser
U6(M62429)
Vol. CONT.
RS-485
Driver/Receiver
Mulutiplexer
U13
U3
SN75LBC1790R
(TC4053)
U8
TA7805F
TA7805F
M51953
AN77L09M
+5V
+5V1
+9V
+15V
U9
U10
U11
(05P0715)
LINE
Reset
Reset
Reset
Earspeaker
(Handset)
Vol. Cont. 32step
DATA A/B
CONT
Distress switch
TXD
RXD
U5
U5
Line out
U4
U14
U7
Q5, 6
Line in
U1
Handset MIC
Mute
EEROM
(CAT25C16S)
(DN6848S)
PTT SW
S1
A/B
C
Z0
IN1
IN2
OUT1
OUT2
Z1
Zcom
Y0
Ycom
Y1
X0
Xcom
X1
DTMF
CLK
DATA
R45
R34
R35
05P0781
HS CONT
J2-#1,2
J2-#3
J2-#7,8
J2-#5,6
J2-#9
J2-#4

Furuno HS-8800 Specifications

General

Brand	Furuno
Model	HS-8800
Category	Cordless Telephone
Language	English