Datasheet

 2012-2013 Microchip Technology Inc. Advance Information DS40001667C-page 3
MGC3130
TABLE 1: 28-PIN QFN PINOUT DESCRIPTION
Pin Name
Pin
Number
Pin Type Buffer Type Description
VCAPS 1P— External filter capacitor (10 µF) connection for internal STEP-UP
converter (optional).
V
INDS 2P
—
External inductor (4.7 µH) + Schottky diode connection for internal
STEP-UP converter usage (optional).
V
SS2 3P
—
Ground reference for the STEP-UP converter.
RX0 4 I Analog
Analog input channels: Receive electrode connection.
RX1 5 I Analog
RX2 6 I Analog
RX3 7 I Analog
RX4 8 I Analog
V
CAPA 9P
—
External filter capacitor (4.7 µF) connection for internal analog
voltage regulator (3V).
V
SS3 10 P
—
Common ground reference for analog and digital domain.
V
CAPD 11 P
—
External filter capacitor (4.7 µF) connection for internal digital
voltage regulator (1.8V).
EIO0 12 I/O ST Extended IO0 (EIO0)/Transfer Status (TS). TS line requires
external 10 kpull-up
EIO1 13 I/O ST Extended IO1 (EIO1)/Interface Selection Pin 1 (IS1).
EIO2 14 I/O ST Extended IO2 (EIO2)/IRQ0.
IS2 15 I ST Interface Selection Pin 2 (IS2).
NC 16
——
Reserved: do not connect.
NC 17
——
Reserved: do not connect.
NC 18
——
Reserved: do not connect.
EIO3 19 I/O ST Extended IO3 (EIO3)/IRQ1/SYNC.
EIO4/SI0 20 I/O ST Extended IO4 (EIO4)/Serial Interface 0 (SI0): I
2
C™_SDA0/
SPI_MISO. When I
2
C™ is used, this line requires an external 1.8
kpull-up.
EIO5/SI1 21 I/O ST Extended IO5 (EIO5)/Serial Interface 1 (SI1): I
2
C™_SCL0/SPI_-
MOSI. When I
2
C™ is used, this line requires an external 1.8 k
pull-up.
EIO6/SI2 22 I/O ST Extended IO6 (EIO6)/Serial Interface 2 (SI2): I
2
C™_SDA1/
SPI_CS. When I
2
C™ is used, this line requires an external 1.8 k
pull-up.
EIO7/SI3 23 I/O ST Extended IO7 (EIO7)/Serial Interface 3 (SI3): I
2
C™_SCL1/SPI_S-
CLK. When I
2
C™ is used, this line requires an external 1.8 k
pull-up.
MCLR
24 I/P ST Master Clear (Reset) input. This pin is an active-low Reset to the
device. It requires external 10 kpull-up.
T
XD 25 O Analog Transmit electrode connection.
NC 26
——
Reserved: do not connect.
V
SS1 27 P
—
Common ground reference for analog and digital domains.
VDD 28 P
—
Positive supply for peripheral logic and I/O pins.
It requires an external filtering capacitor (100 nF).
EXP 29 P
—
Exposed pad. It should be connected to Ground.
Legend: P = Power; ST = Schmitt Trigger input with CMOS levels; O = Output; I = Input; — = N/A