MAX14830 Datasheet, PDF (15/68 Pages) Maxim Integrated Products – Quad Serial UART with 128-Word FIFOs

MAX14830
Quad Serial UART with 128-Word FIFOs
Pin Configuration
TOP VIEW
36 35 34 33 32 31 30 29 28 27 26 25
GPIO14 37
24 CTS1
GPIO15 38
23 RTS1
RTS3 39
22 GPIO7
CTS3 40
21 GPIO6
RX3 41
20 GPIO5
TX3 42
VEXT 43
XOUT 44
MAX14830
19 GPIO4
18 TX0
17 RX0
XIN 45
16 CTS0
AGND 46
VA 47
+
15 RTS0
*EP
14 GPIO3
V18 48
13 GPIO2
1 2 3 4 5 6 7 8 9 10 11 12
*CONNECT EP TO AGND.
TQFN
(7mm × 7mm)
Pin Description
PIN
NAME
FUNCTION
1
SPI/I2C SPI or Active-Low I²C Selector Input. Drive SPI/I2C high to enable SPI. Drive SPI/I2C low to enable I²C.
2
LDOEN
LDO Enable Input. Drive LDOEN high to enable the internal 1.8V LDO. Drive LDOEN low to disable the
internal LDO. When LDOEN is low, V18 can be supplied by an external voltage source.
3
MISO/SDA
Serial-Data Output. When SPI/I2C is high, MISO/SDA functions as the MISO, SPI serial-data output.
When SPI/I2C is low, MISO/SDA functions as the SDA, I²C serial-data input/output.
4
SCLK/SCL
Serial-Clock Input. When SPI/I2C is high, SCLK/SCL functions as the SCLK, SPI serial-clock input (up
to 26MHz). When SPI/I2C is low, SCLK/SCL functions as the SCL, I²C serial-clock input (up to 1MHz).
Active-Low Chip-Select and Address 0 Input. When SPI/I2C is high, CS/A0 functions as the CS, SPI
5
CS/A0 active-low chip-select input. When SPI/I2C is low, CS/A0 functions as the A0, I²C device address pro-
gramming input. Connect CS/A0 to SDA, SCL, DGND, or VL when SPI/I2C is low.
Serial-Data and Address 1 Input. When SPI/I2C is high, MOSI/A1 functions as the MOSI, SPI serial-
6
MOSI/A1 data input. When SPI/I2C is low, MOSI/A1 functions as the A1, I²C device address programming input.
Connect MOSI/A1 to SDA, SCL, DGND, or VL when SPI/I2C is low.
7
IRQ Active-Low Interrupt Open-Drain Output. IRQ is asserted when an interrupt is pending.
8
RST
Active-Low Reset Input. Drive RST low to force all of the UARTs into hardware reset mode. In hardware
reset mode, the oscillator and the internal PLL are shut down and there is no clock activity.
Maxim Integrated
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