FT232BM データシートの表示（PDF） - Future Technology
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FT232BM Datasheet PDF : 25 Pages
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• EEPROM Interface
Though the FT232BM will work without the optional
EEPROM, an external 93C46 (93C56 or 93C66)
EEPROM can be used to customise the USB VID,
PID, Serial Number, Product Description Strings
and Power Descriptor value of the FT232BM for
OEM applications. Other parameters controlled
by the EEPROM include Remote Wake Up,
Isochronous Transfer Mode, Soft Pull Down on
Power-Off and USB 2.0 descriptor modes.
The EEPROM should be a 16 bit wide
configuration such as a MicroChip 93LC46B or
4.0 Device Pin-Out
FT232BM USB UART ( USB - Serial) I.C.
equivalent capable of a 1Mb/s clock rate at VCC =
4.35V to 5.25V. The EEPROM is programmable-
on board over USB using a utility available from
FTDI’s web site (http://www.ftdichip.com). This
allows a blank part to be soldered onto the PCB
and programmed as part of the manufacturing and
test process.
If no EEPROM is connected (or the EEPROM
is blank), the FT232BM will use its built-in
default VID, PID Product Description and Power
Descriptor Value. In this case, the device will not
have a serial number as part of the USB descriptor.
EESK
EEDATA
VCC
RESET#
RSTOUT#
3V3OUT
USBDP
USBDM
32
25
1
24
FTDI
FT232BM
8
XXYY 17
9
16
RXD
RTS#
CTS#
DTR#
DSR#
DCD#
RI#
GND
AVV V
VCCC
6
3V3OUT
V
C
C
C
C
I
O
8
USBDM
7
USBDP
5
RSTOUT#
4
RESET#
25
TXD
24
RXD
23
RTS#
22
CTS#
21
DTR#
20
DSR#
19
DCD#
18
RI#
27
XTIN
16
TXDEN
12
TXLED#
28
XTOUT
11
RXLED#
32
EECS
1
EESK
14
PWRCTL
2
EEDATA
15
PWREN#
31
TEST
10
A
SLEEP#
GGG
NNN
DDD
Figure 1
Pin-Out
(LQFP-32 Package )
Figure 2
Pin-Out
(Schematic Symbol )
DS232B Version 1.8 © Future Technology Devices Intl. Ltd. 2005
Page 7 of 25
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