Kenwood FZDA07ELEF2 Service Manual page 20

FZDA07ELEF2/EREF2/MRHF2
MICROCOMPUTER'S TERMINAL DESCRIPTION
Pin No. Pin Name
26 RDS_RXD
26 NC
27 BEEP
28 DIR2_CS
28 RDS_MUTE
29 DIR2_RST
29 NC
30 NC
31 BUS_DO
32 BUS_DI
33 EVSS
34 EVDD
35 TUN_SDA
36 TUN_SCL
37 SYS_ON
38 SYS_OFF
39 TUN_IF
40 DSP_SI
41 DSP_SO
42 DSP_SCL
43 EVOL_SDA
43 TV_SDA
44 EVOL_SCL
20
I/O Application
I For debugging 9588bps
O Not used
O BEEP output
DIR2 chip select control (Japan/HDD ripping)
O
* Shared with RDS_MUTE
MUTE circuit control during AFS
Connected to MUTE C of E_VOL (Other country
O than Japan)
* Presently, it is an independent control
Shared with DIR2_CS
O DIR2 reset control (Japan/HDD ripping)
O Not used (Other country than Japan)
O Not used
O Sie-BUS data output
I Sie-BUS data input
GND terminal
Power supply terminal
I/O TUNER communication data
I/O TUNER communication clock
O ON request to Sie-BUS
OFF request to Sie-BUS
O
* Not used in the simplifi ed Sie-BUS
I Detection of station in the TUNER
I DSP data input
O DSP data output
O DSP clock output
I2C communication data of EVOL (To the entire
I/O destination)
Shared with TV_SDA
I2C communication data of TV (Japan)
I/O
Shared with EVOL_SDA
I2C communication clock of EVOL (To the entire
I/O destination)
Shared with TV_SCL
Truth Value
Processing Operation Description
Table
H: When debugging no communication,
Communication speed is 9588bps,
L: Output is normally fi xed to L
Output is fi xed to L, Terminal OPEN
3kHz BEEP output (pulse), L: During no operation
L: Selected
H: Unselected
Nch open drain control
L: During MUTE operation
Hi-Z: When MUTE is cleared
L: Reset, H: Reset is cleared
Output is fi xed to L, Terminal OPEN
Output is fi xed to L, Terminal OPEN
H: During no communication,
Communication speed is about 17kHz
Input (H): During no communication,
Communication speed is about 17kHz
GND connection
BU3.3V connection
H (Hi-z): During no communication,
Communication speed is 328kHz
H (Hi-z): During no communication,
Communication speed is 328kHz
L: System ON request, H (Hi-z): Not requested
L: When system OFF is requested
H (Hi-z): Not requested
L: When station is found , H: When station is not found
H: During no communication, Communication
speed is variable, During boot-up: 1.97MHz,
Normal condition: 3.93MHz
Input (H): During no communication,
Communication speed is variable, During boot-
up: 1.97MHz, Normal condition: 3.93MHz
H: During no communication, Communication
speed is variable, During boot-up: 1.97MHz,
Normal condition: 3.93MHz
H (Hi-z): During no communication,
Communication speed is 328kHz
H (Hi-z): During no communication,
Communication speed is 328kHz
H (Hi-z): During no communication,
Communication speed is 328kHz