HT45B0K Datasheet, PDF (1/23 Pages) Holtek Semiconductor Inc – SPI to USB Bridge

HT45B0K
SPI to USB Bridge
Features
● Glueless slave SPI interface to Holtek's MCU
● USB (Universal Serial Bus) 1.1 Full-speed module
− 6 endpoints (endpoint 0 included)
− FIFO: 8, 8, 8, 64, 8, 64 for EP0~EP5 respectively
● Operating voltage: VDD = 3.3V~5.5V
● 6MHz/12MHz (CLKI) external clock input for USB PLL clock
● Suspend Mode with low suspend current
● Remote Wake-up function
● USB Multiple Interrupt Generation Sources:
♦ Access of the corresponding USB FIFO from the USB host
♦ USB suspend signal from the USB host
♦ USB resume signal from the USB host
♦ USB Reset signal from the USB host
● CMOS external clock input, CLKI, with frequency 6MHz/12MHz for the USB PLL clock
● 16-pin NSOP package
General Description
This device is a companion chip for microcontrollers to provide USB connectivity with the USB
host. Six USB endpoints are supported with 8/8/8/64/8/64-byte FIFO for endpoint 0~5 respectively.
An external interrupt output to the host MCU is used for inetrrupt-driven operation.
However, the host MCU may also poll the status register to obtain the latest status if the interrupt is
not used.
The possible applications include low-cost data links for computers/peripherals, portable and
battery operated devices/instruments, factory automation and process control.
Block Diagram
SDI
V 33O
SDO
USB
M o d u le
UDP
SCK
S e r ia l
I/O
UDN
V D D _{In te rfa c e}
SCS
C LK I
P LL
48M H z
IN T
VDD
T o a ll
c h ip
GND
pow er
Rev 1.00
1
March 22, 2010