M054ZBN Datasheet, PDF (15/68 Pages) List of Unclassifed Manufacturers – 32-BIT MICROCONTROLLER

NuMicro^™ M052/M054BN Data Sheet
5.3 Pin Description
Pin number
QFN33 LQFP48
Symbol
Alternate Function
1
2
3
Type^[1]
Description
11
16
XTAL1
CRYSTAL1: This is the input pin to the internal
I _{inverting amplifier. The system clock is from}
(ST) ^{external crystal or resonator when FOSC[1:0]}
(CONFIG3[1:0]) are both logic 1 by default.
10
15
XTAL2
CRYSTAL2: This is the output pin from the
O internal inverting amplifier. It emits the inverted
signal of XTAL1.
27
41
VDD
POWER SUPPLY: Power supply to I/O ports
P and LDO source for internal PLL and digital
circuit.
12
17
VSS
33
GROUND: Digital Ground potential.
P
28
42
AVDD
P
POWER SUPPLY: Power supply to internal
analog circuit.
4
6
AVSS
13
18
LDO_CAP
P GROUND: Analog Ground potential.
LDO: LDO output pin
P _{Note: It needs to be connected with a 1uF}
capacitor.
2
4
RST
RESET: /RST pin is a Schmitt trigger input pin
for hardware device reset. A “Low” on this pin
for 768 clock counter of Internal RC 22M while
I _{the system clock is running will reset the}
(ST) _{device. /RST pin has an internal pull-up}
resistor allowing power-on reset by simply
connecting an external capacitor to GND.
26
40
25
39
NC
38
NC
37
24
35
P0.0
P0.1
P0.2
P0.3
P0.4
CTS1
RTS1
CTS0
RTS0
SPISS1
AD0
TXD1^[2]
D,
I/O
PORT0: Port 0 is an 8-bit four mode output pin
and two mode input. Its multifunction pins are
for CTS1, RTS1, CTS0, RTS0, SPISS1,
AD1
RXD1^[2]
D,
I/O
MOSI_1, MISO_1, and SPICLK1.
P0 has an alternative function as AD[7:0] while
external memory accessing. During the
AD2
TXD^[2]
D, ^{external memory access, P0 will output high}
I/O ^{will be internal strong pulled-up rather than}
weak pull-up in order to drive out high byte
address for external devices.
AD3
RXD^[2]
D,
I/O ^{These pins which are SPISS1, MOSI_1,}
MISO_1, and SPICLK1 for the SPI function
used.
AD4
D,
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Publication Release Date: Mar. 19, 2012
Revision V1.01