AN2135SC Cypress Semiconductor Corp, AN2135SC Datasheet - Page 149

• Manufacturer Part Number: AN2135SC
• Description: IC MCU 8051 8K RAM 24MHZ 44QFP
• Manufacturer: Cypress Semiconductor Corp
• Series: EZ-USB®r

Specifications of AN2135SC

• 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: 428-1308

8.3.1 Initialization
To initialize an isochronous OUT endpoint, the 8051:
8.3.2 OUT Data Transfer
When an SOF interrupt occurs, the 8051 is presented with FIFOs containing OUT data
sent from the host in the previous frame, along with 10-bit byte counts, indicating how
many bytes are in the FIFOs. The 8051 has 1 ms to transfer data out of these FIFOs before
the next SOF interrupt arrives.
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OUT15ADDR
OUTISOVAL
Sets the endpoint valid bit for the endpoint.
Sets the endpoint’s FIFO size by loading a starting address (Section 8.4, "Setting
Isochronous FIFO Sizes").
Enables the SOF interrupt. All isochronous endpoints are serviced in response to
the SOF interrupt.
USBIEN
15
A9
FIFO Start Address (see text)
Initialization
7
Registers Associated with an ISO OUT endpoint
Endpoint Valid (1=valid)
A8
14
6
SOFIE (1=enabled)
A7
13
5
12
A6 A5
4
Figure 8-3. Isochronous OUT Registers
11
3
(EP15OUT shown as example)
10
A4
2
Chapter 8. EZ-USB CPU
9
0
1
8
0
0
OUT15DATA
OUT15BCH
OUT15BCL
USBIRQ
ISOERR
15
Data transfer
7
7
7
7
OUT15 CRC Error (1=error)
SOFIR (1=clear request)
Received Byte Count (H)
Received Byte Count (L)
14
6
6
6
6
Data from USB
13
5
5
5
5
12
4
4
4
4
11
3
3
3
3
10
2
2
2
2
EZ-USB TRM v1.9
1
1
9
1
9
0
0
8
0
8