AN2136SC Cypress Semiconductor Corp, AN2136SC Datasheet - Page 189
AN2136SC
Manufacturer Part Number
AN2136SC
Description
IC MCU 8051 8K RAM 24MHZ 44QFP
Manufacturer
Cypress Semiconductor Corp
Series
EZ-USB®r
Datasheet
1.AN2131SC.pdf
(334 pages)
Specifications of AN2136SC
Applications
USB Microcontroller
Core Processor
8051
Program Memory Type
ROMless
Controller Series
AN213x
Ram Size
8K x 8
Interface
I²C, USB
Number Of I /o
8
Voltage - Supply
3 V ~ 3.6 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
44-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
428-1309
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A USB device recognizes SUSPEND as 3 ms of a bus idle (“J”) state. The EZ-USB core
alerts the 8051 by asserting the USB (INT2) interrupt and the SUSPEND interrupt vector.
This gives the 8051 code a chance to perform power SUSPEND interrupt vector. This
gives the 8051 code a chance to perform power conservation housekeeping before shut-
ting down the oscillator.
Page 11-2
11.2
Suspend
No USB activity
for 3 msec.
Figure 11-2. EZ-USB Suspend Sequence
Chapter 11. EZ-USB Power Management
"SUSPEND"
Interrupt
STOP
USB
PCON.0
Oscillator
12 MHz
48 MHz
8051
div by
INT2
PLL
2
CLK24
EZ-USB TRM v1.9
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