USBN9604-28MX National Semiconductor, USBN9604-28MX Datasheet - Page 24

• Manufacturer Part Number: USBN9604-28MX
• Description: IC,Bus Controller,SOP,28PIN
• Manufacturer: National Semiconductor

Specifications of USBN9604-28MX

• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

6.0 Functional Description
set_reset
set_suspend
set_oper
clear_suspend
reset_det
local_event
sd5_det
suspend_det
resume_det
resume_compl
Transition
State
Notes:
suspend_det &
1. When the node is not in NodeOperational state, all registers are frozen with the exception of the endpoint con-
1. In NodeResume state, resume signaling is propagated upstream.
2. In NodeSuspend state, the node may enter a low power state and is able to detect resume signaling.
set_suspend
troller state machines, and the TX_EN, LAST and RX_EN bits which are reset.
NodeSuspend
11b
resume_det &
Node Functional State register NFS[1:0] bits are written with 00
The firmware should only initiate set_reset if RESET in the ALTEV register is set.
Node Functional State register NFS[1:0] bits are written with 11
The firmware should only initiate set_suspend if SD3 in the ALTEV register is set.
Node Functional State register NFS[1:0] bits are written with 10
Node Functional State register NFS[1:0] bits are written with 01
The firmware should only initiate clear_suspend if SD5 in the ALTEV register is set.
RESET in the ALTEV register is set to 1
A local event that should wake up the USB.
SD5 in the ALTEV register is set to 1.
SD3 in the ALTEV register is set to 1.
RESUME in the ALTEV register is set to1.
The node should stay in NodeResume state for at least 10mS and then must enter
USB Operational state to detect the EOP from the host, which terminates this Remote
Resume operation. EOP is signalled when EOP in the ALTEV register is set to 1.
set_oper
NodeOperational
local_event & sd5_detect &
Figure 18. Node Functional State Diagram
(Continued)
clear_suspend
10b
Table 3. Functional States
resume_compl &
set_oper
reset_det & set_reset
NodeResume
23
01b
Condition Asserted
Bold Italics = Transition initiated by firmware
reset_det &set_reset
set_oper
NodeReset
00b
hw/sw reset
b
b
b
b
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