SL11R Cypress Semiconductor Corp, SL11R Datasheet - Page 28

• Manufacturer Part Number: SL11R
• Description: IC MCU FULL SPD USB 16B 100LQFP
• Manufacturer: Cypress Semiconductor Corp

Specifications of SL11R

• Applications: USB Microcontroller
• Core Processor: RISC
• Program Memory Type: Mask ROM (6 kB)
• Controller Series: USB Controller
• Ram Size: 3Kx8
• Interface: 2-Wire Serial, UART, USB
• Number Of I /o: 32
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: 0°C ~ 65°C
• Mounting Type: Surface Mount
• Package / Case: 100-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 428-1462

4.12.2
This register is used by the SL11R BIOS to detect the UART status function via RXF and TXE flags.
Note:
No error detection for received data is supported.
4.12.3
This register is used by the SL11R BIOS to send data to the host.
4.12.4
This register is used by the SL11R BIOS to receive data from the host.
4.13
The SL11R provides an interface to an external serial EEPROM. The interface is implemented using General Purpose I/O signals.
A variety of serial EEPROM formats can be supported: currently the BIOS ROM supports the two-wire serial EEPROM type. The
serial EEPROM can be used to store specific Peripheral USB configuration and add on value functions. It can also be used for
field product upgrades
The SL11R BIOS uses an interrupt to read and write from/to an external serial EEPROM. The recommended serial EEPROM
device is a 2-Wire Serial CMOS EEPROM (AT24CXX Device Family). Currently, the SL11R BIOS Revision 1.1 allows reading/writ-
ing to/from EEPROM, up to 2K Bytes (16K bits), 2-wire serial interface device (i.e. AT24C16).
The user’s program and USB vendor/device configuration can be programmed and stored into the external EEPROM device. On
power up the content of the EEPROM will be downloaded into RAM and may be executed as code or used as data, or both. The
advantage of the 2-wire serial interface/EEPROM interface is the space and cost saving when compared to using an external
8-bit PROM/EPROM.
The SL11R BIOS uses two GPIO pins, GPIO31 and GPIO30 to interface to an external serial EEPROM (see Figure 4-4):
Document #: 38-08006 Rev. **
• GPIO31 is connected to the Serial Clock Input (SCL).
• GPIO30 is connected to the Serial Data (SDA).
• We recommend you add a 5K to 15K pull-up resistor on the Data line (e.g. GPIO30).
D0
D15-D2
D1
D0
D7-D0
D7-D0
D15
D15
0
0
UART Status Register (0xC0E2: Read Only)
UART Transmit Data Register (0xC0E4: Write Only)
UART Receive Data Register (0xC0E4: Read Only)
Serial EEPROM Interface (2-wire serial interface)
D14
D14
0
0
D13
0
D13
E
Reserved bits
RXF
TXE
TR7-0
RD7-0
0
D12
0
D12
0
D11
0
D15-D7
D11
0
0
Enable UART when set = ’1’. When ’0’ UART pins are GPIO.
Set to all zeros.
Receive Buffer Full Flag.
Transmit Buffer Empty Flag. Set to ‘1’ when data moves from buffer to output
shift register.
UART Transmit Data
UART Receive Data.
D10
0
D10
0
D6
0
D9
0
D9
0
D5
0
D8
0
D8
0
D4
0
RD7
D7
TR7
D7
D3
0
RD6
D6
TR6
D2
D6
0
RD5
RXF
D5
TR5
D1
D5
RD4
TXE
TR4
D4
D0
D4
RD3
TR3
D3
D3
RD2
TR2
D2
D2
TR1
RD1
D1
D1
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TR0
D0
RD0
SL11R
D0