Document No.: FT_000589
FT313H USB2.0 HS Host Controller Datasheet Version 1.1
Clearance No.: FTDI# 318
If the microcontroller has no AD<0> pin for 16-bit wide devices, the unused AD<0> signal with must be
terminated with an external 10k ohm pull-down resistor.
If DMA transfers are not used the DACK and DREQ signals may be left floating or the DACK signal may be
terminated with external 10k ohm pull-down resistor.
7.1.6 8-Bit General Multiplex asynchronous bus interface
FT313H
Microcontroller
CS_N
CS_E/CS_N
OE_N/RE_N/RD_N
RE_N
WE_N/WR_N
AD<7:0>
A<7:0>
WE_N
AD<7:0>
INT
INT
ADV_N/ALE
DACK
ALE
DACK
DREQ
DREQ
8-Bit General Multiplex uses AD<7:0> signals as address and data bus. The unused high data bus
AD<15:8> and A<7:0> address bus must be terminated with external 10k ohm pull-down resistors.
If DMA transfers are not used the DACK and DREQ signals may be left floating or the DACK signal may be
terminated with external 10k ohm pull-down resistor.
Copyright © 2012 Future Technology Devices International Limited
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