FT121T-R FTDI, FT121T-R Datasheet - Page 22

• Manufacturer Part Number: FT121T-R
• Description: USB Interface IC USB CONTROLLER W/SPI SLAVE IC
• Manufacturer: FTDI

Specifications of FT121T-R

• Rohs: yes
• Product: USB 2.0
• Interface Type: SPI, USB
• Operating Supply Voltage: 4 V to 5.5 V
• Operating Supply Current: 3.9 mA
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: TSSOP-16
• Minimum Operating Temperature: - 40 C

Table 6-5 Configuration Register (Byte 1)
Table 6-6 Configuration Register (Byte 2)
7-6
3-0
5-4
Bit
Bit
2
3
4
5
6
7
Clock Running
Interrupt Mode
DP_Pullup
Reserved
Endpoint Configuration
Mode
Reserved
Reserved
SET_TO_ONE
SOF-only Interrupt
Mode
Symbol
Symbol
Copyright © 2012 Future Technology Devices International Limited
FT121 ENHANCED USB DEVICE CONTROLLER WITH SPI SLAVE IC
0b’1011
Reset
Reset
0b’00
0b’00
1
1
0
0
0
0
0: internal clocks stop during USB suspend
1: internal clocks continue running during USB suspend
This bit must be set to ‘0’ for bus powered application in
order to meet the USB suspend current requirement.
Note: The programmed value will not be changed by a
bus reset.
0: interrupt will not generate on NAK or Error
transactions
1: interrupt will generate on NAK and Error transactions
Note: The programmed value will not be changed by a
bus reset.
0: Pullup resistor on DP pin disabled
1: Pullup resistor on DP pin enabled when Vbus is
present
Note: The programmed value will not be changed by a
bus reset.
Reserved, write to 0
Set the endpoint configuration mode for EP2.
00: Mode 0 (Non-ISO Mode)
01: Mode 1 (ISO-OUT Mode)
10: Mode 2 (ISO-IN Mode)
11: Mode 3 (ISO-IO Mode)
In Enhanced Mode, these 2 bits are reserved. The
Endpoint Configuration will be done through separate
command. See “Set Endpoint Configuration” commands.
Reserved, write to 0b’1111
Reserved, write to 0
This bit must be set to 1
0: normal operation
1: interrupt will generate on receiving SOF packet only,
regardless the value of the Interrupt Pin Mode bit in the
Interrupt configuration register.
Description
Description
Document No.: FT_000648
Clearance No.: FTDI#
Datasheet Version 1.0
312
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