Kenwood Ez700SR Service Manual page 13

MICROCOMPUTER'S TERMINAL DESCRIPTION
r Antenna Detection Method
(1) SSM internal circuit is used to detect antenna connection. Sub µ-
com makes judgment by a notification from SSP.
(2) Current detection for excess current protection uses the same
method as KTC-SR902.
It is necessary to change the threshold set by software, as resis-
tance value for detection has been changed.
When the value is "28" or higher, it is determined that excess cur-
rent is detected → DC/DC is stopped.
(3) Antenna power supply produced in DC/DC is 7.2V.
t
Normal Condition
Signal name Terminal setting
UART_O H/L
UART_SW L
LX_DATA_M_2 H/L
URAT_I
LX_DATA_S_2
URATcommunication permitted condition (In test mode, permission is
to be given when 5L sources equivalent to simplified AUX are recog-
nized.)
Signal name
UART_O H/L
UART_SW H
LX_DATA_M_2 Z
(OD H-output or input setting)
URAT_I
Ignore
LX_DATA_S_2
y
Normal Condition
Signal name
UART_O H/L
U_SW L
URAT_I
URAT connection permitted condition (Permission is to be given when
receiving specific command from UART terminal, or in case of IDM D/
L. Recovery is made only by resetting.)
Signal name
UART_O Z
U_SW H
Debug terminal TX
URAT_I
LX DATA M
Debug terminal RX
LX DATA S
u
*1
*2
*3 1080
Debug terminal TX
*4 1440
*5 1800
LX DATA M
Debug terminal RX
When f0 is outside the range of ((n1xf3) ±85)
q
LX DATA S
(n1=1,2,3,4,5)
When f0 is within the range of ((n1xf3) ±85)
w
(n1=1,2,3,4,5)
When f0 is within the range of ((n1xf3) ±85) and
e at the same time within the range of ((n1xf1) ±85)
(n1=1,2,3,4,5)
* f1~f3 are written on E2PROM.
Ez700SR/Ez900HDS
Terminal setting
ID M UART RX
IDM UART TX
Terminal setting
(OD H-output or input setting)
ID M UART RX
Ignore
IDM UART TX
K (10kHz_span)
f1 f2 f3
360 405 445
720 810 890
1215 1335
1620 1780
2025 2225
Debug terminal TX
Debug terminal RX
Debug terminal TX
→ (Used as RX.)
Debug terminal RX
→ (Used as TX.)
SW1 SW2
H L
L L
L H
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