ft8u245am Future Technology Devices International Ltd., ft8u245am Datasheet - Page 5

• Manufacturer Part Number: ft8u245am
• Description: Usb Fifo - Fast Parallel Data Transfer Ic
• Manufacturer: Future Technology Devices International Ltd.

Pin #
3,13,26
9.17
Future Technology Devices Intl.
27
28
31
32
25
24
23
22
21
20
19
18
16
15
14
12
11
10
30
29
7
8
6
4
1
2
5
Table 1 - FT8U245AM - PINOUT DESCRIPTION
Signal
EEDATA
EEREQ#
EEGNT#
3V3OUT
RESET#
USBDM
USBDP
XTOUT
RCCLK
AGND
EECS
AVCC
EESK
TEST
TXE#
RXF#
XTIN
GND
VCC
RD#
WR
D0
D1
D2
D3
D4
D5
D6
D7
Type
PWR
PWR
PWR
PWR
OUT
OUT
OUT
OUT
OUT
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
IN
IN
IN
IN
IN
IN
Description
USB Data Signal Plus – Requires 1.5k pull-up to 3V3OUT
USB Data Signal Minus
3.3 volt Output from integrated regulator
Input to 6MHz Crystal Oscillator Cell
Output from 6MHz Crystal Oscillator Cell
RC timer – used to guarantee clock stability on exiting sleep
mode. Clamped low during reset or sleep condition.
Resets entire device using external RC network
Optional EEPROM – Chip Select
Optional EEPROM – Clock
Optional EEPROM – Data I/O
Puts device in i.c. test mode – must be tied to GND
Bi-directional Data Bus Bit # 0
Bi-directional Data Bus Bit # 1
Bi-directional Data Bus Bit # 2
Bi-directional Data Bus Bit # 3
Bi-directional Data Bus Bit # 4
Bi-directional Data Bus Bit # 5
Bi-directional Data Bus Bit # 6
Bi-directional Data Bus Bit # 7
Enables Current FIFO Data Byte on D0..D7.when low.
Fetches the next FIFO Data Byte ( if available ) from the
Receive FIFO Buffer when RD# goes from low to high.
Writes the Data Byte on the D0..D7 into the Transmit FIFO
Buffer when WR goes from high to low.
When high, do not write data into the FIFO. When low, data can
be written into the FIFO by strobing WR high then low.
When high, do not read data from the FIFO. When low, there is
data available in the FIFO which can be read by strobing RD#
low then high again.
Requests the EEPROM contents to be accessed via the Data
Bus.
When low, allows the EEPROM contents to be accessed via the
Data Bus.
Device - +4.4 volt to +5.25 volt Power Supply Pins
Device – Ground Supply Pins
Device - Analog Power Supply for the internal x8 clock multiplier
Device - Analog Ground Supply for the internal x8 clock
multiplier
FT8U245AM Preliminary Information Rev 0.9 – Subject to Change