Datasheet

MAX3421E
USB Peripheral/Host Controller
with SPI Interface
4
Maxim Integrated
Functional Diagram
GPIN0
1V TO 3V
VBCOMP
D-
D+
V
CC
R
GPIN
V
BUS
COMP
SS
MISO
SCLK
INT
SPI SLAVE
INTERFACE
USB SIE
(SERIAL-
INTERFACE
ENGINE)
FULL-SPEED/
LOW-SPEED
USB
TRANSCEIVER
RESET
LOGIC
1.5kΩ
INTERNAL
POR
RES XI XO
POWER
DOWN
OSC
AND
4x PLL
48MHz
ESD
PROTECTION
ESD
PROTECTION
GPX
OPERATE
SOF
BUSACT/
INIRQ
MUX
0123
MOSI
VBUS_DET
ENDPOINT
BUFFERS
MAX3421E
GND
GPIN1
GPIN2
GPIN3
GPIN4
GPIN5
GPIN6
GPIN7
GPOUT0
GPOUT1
GPOUT2
GPOUT3
GPOUT4
GPOUT5
GPOUT6
GPOUT7
V
L
R
IN
15kΩ
15kΩ