Yamaha YDS-12, Service Manual

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7
YDS-12
YDS-1
2
IC5
R5F21284SNSP
P3_5
TXD1
/RESET
XOUT
VSS
XIN
VCC
MODE
RXD1
P1_7
1
2
3
4
5
6
7
8
9
10
P3_4
P3_3
P1_0
P1_1
VREF
P1_2
P1_3
TXD0
RXD0
CLK0
20
19
18
17
16
15
14
13
12
11
Pin No. Port Name Function Name I/O Detail of Function
1 P3_5 FET_CTRL O FET control output
2 TXD1 TXD1 O RS232C transmit data output
3 /RESET /RESET I Reset input
4 XOUT XOUT O XOUT clock output
5 VSS VSS I GND
6 XIN XIN I XIN clock input
7 VCC VCC I Power supply input
8 MODE MODE I H : Normal mode, L : Flash rewrite mode
9 RXD1 RXD1 I RS232C receive data input
10 P1_7 DOCK_ID I Dock_ID input (YDS-12/YDS-11)
11 CLK0 CLK0 O SPI_CLK
12 RXD0 RXD0 I SPI_SOMI
13 TXD0 TXD0 O SPI_SIMO
14 P1_3 CP_NRESET O Reset for authentication coprocessor
15 P1_2 ACCPWR_OUT O Accessory_power output to receiver
16 VREF VREF I Reference voltage input
17 P1_1 IPOD_DET_IN I iPod_detect input
18 P1_0 ACCPWR_IN I Accessory_power input from iPod
19 P3_3 SW_SEL_B O RS232C SW select B
20 P3_4 SW_SEL_A O RS232C SW select A
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IC DATA
IC5: R5F21284SNSP (MAIN P.C.B.)
Microprocessor
DRAFT