FT221XS-U FTDI, FT221XS-U Datasheet - Page 4

• Manufacturer Part Number: FT221XS-U
• Description: USB Interface IC USB to 8 bit SPI / FT1248 IC SSOP-20
• Manufacturer: FTDI

Specifications of FT221XS-U

• Rohs: yes
• Tradename: X-Chip

2
Figure 2.1 FT221X Block Diagram
For a description of each function please refer to Section 4.
FT221X Block Diagram
3V3OUT
USBDP
USBDM
VCC
GND
3.3 Volt LDO
Transceiver
1.5k pullups
Regulator
and battery
USB DPLL
Integrated
detection
Oscillator
Internal
12MHz
charge
USB
with
Copyright © 2013 Future Technology Devices International Limited
1.8 Volt LDO
Regulator
X4 Clock
Multiplier
Serial Interface
Engine
(SIE)
Core Supply
1V8 Internal
48MHz
Protocol Engine
FIFO RX Buffer
FIFO TX Buffer
Internal MTP
(512 bytes)
(512 bytes)
Memory
USB
Document No.: FT_000630 Clearance No.: FTDI# 263
To USB Transceiver Cell
RESET#
Generator
Controller
Reset
VCCIO
FT1248
3V3OUT
Version 1.2
CLK
CS#
MISO
MIOSI[0]
MIOSI[1]
MIOSI[2]
MIOSI[3]
MIOSI[4]
MIOSI[5]
MIOSI[6]
MISOI[7]
CBUS3
4