ST7570 データシートの表示（PDF） - STMicroelectronics
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ST7570 Datasheet PDF : 26 Pages
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Pin connection
ST7570
Table 2. Pin description (continued)
Pin
Name
Type
Reset state Pull-up
Description
26
PA_OUT Analog output
-
- Power amplifier output
1.8 V digital supply / internal regulator output
27 VDD_REG_1V8 Power
-
-
Externally accessible for filtering purposes only
28
VDDIO
Power
-
- 3.3 V – 5 V I/O external supply
29
NC
-
-
- Not used, leave floating
30
NC
-
-
- Not used, leave floating
31 RESERVED6
-
-
- Pull up to VDDIO
32
NC
-
-
- Not used, leave floating
33
GND
Power
-
- Digital ground
34
VDDIO
Power
-
- 3.3 V – 5 V I/O supply
35
VSSA
Power
-
- Analog ground
Configurable digital output:
- Slot synchronization (PRESLOT),
- Zero Crossing (ZC),
- Timeslot (TS),
PRESLOT
36
Digital output High Z Disabled - Bit synchronization (BIT),
/ZC/TS/BIT
- Transmission in progress (TXP),
- Reception in progress (RXP),
- Transmission or Reception in progress (TXRXP).
If not used, this pin can be left floating.
37 ZC_IN_D
Digital input
High Z
Disabled
Digital zero-crossing input.
Pull up to VDDIO if not used
38
T_REQ
Digital input High Z Disabled UART communication control line
39
BR1
40
BR0
41 RESERVED0
Digital input
Digital input
-
High Z
High Z
-
Disabled UART baud rate selection
Disabled (sampled after each reset event) see Table 3
- Connect to GND
42 RESERVED1
-
-
- Pull up to VDDIO
43 RESERVED2
-
-
- Pull up to VDDIO
44 RESERVED3
-
-
- Pull up to VDDIO
45
GND
Power
-
- Digital ground
1.8 V digital supply.
46
VDD
Power
-
- Internally connected to VDD_REG_1V8
Externally accessible for filtering purposes only
47 RESERVED4
-
-
- Connect to VDDIO
48 RESERVED5
-
-
- Pull up to VDDIO
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Doc ID 17526 Rev 2
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