Yamaha BD-940, Service Manual

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33
BD-940
BD-940
IC204: R5F21356ANFP (MAIN P.C.B.)
Single chip 16-bit microprocessor
■
IC DATA
R0H
Timers
Port P0
8 8 8 8 5 1 8
Port P1 Port P2 Port P3
2
Port P5 Port P4 Port P6
System clock
generation circuit
XIN-XOUT
High-speed on-chip oscillator
Low-speed on-chip oscillator
XCIN-XCOUT
Low-speed on-chip oscillator
for watchdog timer
Voltage detection circuit
Comparator A
DTC
UART or
clock synchronous serial I/O
(8 bits x 3)
I
2
C bus or SSU
(8 bits x 1)
LIN module
Comparator B
Watchdog timer
(14 bits)
Timer RA (8 bits x 1)
Timer RB (8 bits x 1)
Timer RC (16 bits x 1)
Timer RD (16 bits x 2)
Timer RE (8 bits x 1)
R8C microprocessor core Memory
I/O ports
Peripheral functions
R0L
R1H R1L
R2
SB
INTB
PC
USP
ISP
FLG
ROM
(1)
RAM
(2)
Multiplier
NOTES:
1. ROM size varies with MCU type.
2. RAM size varies with MCU type.
R3
A0
A1
FB
A/D converter
(10 bits x 12 channels)
D/A converter
(8 bits x 2)
1 2 3 4 5 6 7 8 9 10 11 12 13
N_LED_STANDBY
PC_SYS_RE_EN
N.C.
VREF
MODE
PC_YSS_SCL
PC_YSS_SDA
/RESET
XOUT(16MHz)
VSS/AVSS
XIN(16MHz)
VCC/AVCC
SH_SDA
KEY_SKIP_RWD KEY_OPEN_CLOSE KEY_PLAY KEY_STANDBY PC_SYS_PL_EN PC_SYS_MISO PC_SYS_MOSI SH_SH_BUSY SH_YM_BUSY SH_RXD N.C. SH_TXD N.C.
IC204
R5F21356ANFP
39 38 37 36 35 34 33 32 31 30 29 28 27
N_A_MUTE
BD_PS
IR
N.C.
N.C.
12V_CTL
FL_CONT
/LED_STBY
LED_PON
LOW_POWER_CTL
/SH_RESET
PC_YSS_RST
SH_SCL
26
25
24
23
22
21
20
19
18
17
16
15
14
40
41
42
43
44
45
46
47
48
49
50
51
52
KEY_SKIP_FWD
KEY_STOP
N.C.
MAIN_P_CON
PS_DET
N.C.
N.C.
/FL_CS
FL_DATA
FL_CLK
/FL_RESET
PC_PWR_RY
LED_QUICK_START