AN2136SC Cypress Semiconductor Corp, AN2136SC Datasheet - Page 108

• Manufacturer Part Number: AN2136SC
• Description: IC MCU 8051 8K RAM 24MHZ 44QFP
• Manufacturer: Cypress Semiconductor Corp
• Series: EZ-USB®r

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

2-IN/OUT (paired), 4-IN and 4-OUT can use 0x1B40-0x1CBF as data memory. Chapter
3 gives full details of the EZ-USB memory map.
The EZ-USB core automatically maintains the data toggle bits during bulk, control and
interrupt transfers. As explained in Chapter 1, "Introducing EZ-USB," the toggle bits are
used to detect certain transmission errors so that erroneous data can be re-sent.
In certain circumstances, the host resets its data toggle to “DATA0”:
In these cases, the 8051 can directly clear the data toggle for each of the bulk/interrupt/
control endpoints, using the TOGCTL register (Figure 6-5).
EZ-USB TRM v1.9
TOGCTL
Note
AN2122 endpoint memory starts at 0x1C00 and AN2126 endpoint memory starts at
address 0x7C00.
Note
Uploads or Downloads to unused bulk memory can be done only at the Mirrored (low)
addresses shown in Table 6-3.
6.10
•
•
•
b7
Q
R
x
After sending a Clear_Feature: Endpoint Stall request to an endpoint.
After setting a new interface.
After selecting a new alternate setting.
Data Toggle Control
R/W
b6
S
x
R/W
b5
R
Figure 6-5. Bulk Endpoint Toggle Control
x
Data Toggle Control
Chapter 6. EZ-USB CPU
R/W
IO
b4
x
R/W
b3
0
x
EP2
R/W
b2
x
EP1
R/W
b1
x
Page 6-11
EP0
R/W
b0
7FD7
x