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参数资料
| 型号： | YMF781-SZ |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP100 |
| 封装： | LEAD FREE, PLASTIC, SQFP-100 |
| 文件页数： | 8/14页 |
| 文件大小： | 739K |
| 代理商： | YMF781-SZ |
YMF781
3
■
Terminal Functions
No.
Terminal Name (Port)
I/O (Output Type)
Functions
1
A14
O
(4mA)
External memory Address bus 14
2
A15
O
(4mA)
External memory Address bus 15
3
A16
O
(4mA)
External memory Address bus 16
4
LBN/LWRN
(P36)
O
(4mA)
External memory Low byte enable
5
UBN/UWRN
(P37)
O
(4mA)
External memory Upper byte enable
6
VSS
-
Ground
7
VDD
-
Power Supply (3.3V)
8
LED1
O
(4mA)
LED output 1
9
LED2
O
(4mA)
LED output 2
10
RTSN
(P00)
O
(4mA)
Asynchronous Serial (UART) transmission request output
VDDC is used
11
CTSN
(P01)
Ish
Asynchronous Serial (UART) transmission request input
VDDC is used
12
TXD
(P10)
O
(4mA)
Asynchronous Serial (UART) transmission output
VDDC is used
13
RXD
(P11)
Ish
Asynchronous Serial (UART) reception input
VDDC is used
14
VDD
-
Power supply (3.3V)
15
VSS
-
Ground
16
VDDC
-
Power supply (3.3V/5.0V)
17
PD
Ish
Power-down
VDDC is used
18
HSEL
(P20)
Ish
Serial interface selection (Asynchronous / clock sync)
VDDC is used
19
SMODE
(P21)
Ish
Clock sync serial mode selection (MSB/LSB first)
VDDC is used
20
SWRN
(P22)
Ish
Clock sync serial write enable
VDDC is used
21
SRDYN
(P23)
Ish/O
(4mA)
Clock sync serial ready
VDDC is used
22
SCLKN
(P24)
Ish
Clock sync serial clock
VDDC is used
23
SDO
(P25)
Ish/O
(4mA)
Clock sync serial data output
VDDC is used
24
SDI
(P26)
Ish
Clock sync serial data input
VDDC is used
25
IRQN
O
(4mA)
Interrupt output
VDDC is used
26
SEL
Ish
Port selection (clock sync serial / port2)
VDDC is used
27
VSS
-
Ground
28
XI
I
X’tal connection
29
XO
O
X’tal connection
30
VDD
-
Power supply (3.3V)
31
VSS
-
Ground
32
VDD
-
Power supply (3.3V)
33
TST0
Ish
Test input terminal Normally, connect to the ground and use.
34
TST1
Ish
Test input terminal Normally, connect to the ground and use.
35
TDO
O
Test output terminal Normally, use without connection.
36
TMS
Ish
Test input terminal Normally, connect to the power supply
(VDD) and use.
37
TCK
Ish
Test input terminal Normally, connect to the power supply
(VDD) and use.
38
TDI
Ish
Test input terminal
Normally, connect to the power supply
(VDD) and use.
39
TRSTN
Ish
Test input terminal normally, connect to the Ground and use.
40
RSTN
Ish
Hardware reset
41
VDD
-
Power supply (3.3V)
42
VSS
-
Ground
43
VREF
A-
Analog Reference Signal
44
AOL
AO
Analog Lch output or Lch+Rch output (monaural)
45
AOR
AO
Analog Rch output
46
EQ1
A-
Equalizer terminal 1
47
EQ2
A-
Equalizer terminal 2
48
EQ3
A-
Equalizer terminal 3
49
SPVDD
-
Power supply for exclusive use of speaker (3.3V)
50
SPVSS
-
Ground for exclusive use of speaker
Note1: Ｏ: CMOS output terminal, I: CMOS input terminal, Ish: Schmitt CMOS input terminal, A: Analog terminal
Note2: The current value of the ( ) in the I/O (output type) indicates the output drive capability of its terminal.
Note3: The power supply, VDDC can be switched to 3.3V or 5.0V.
Note4: For the terminals without the description of “VDDC is used” in the table, VDD (only 3.3V) is used to drive it.
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