AN2131QC Cypress Semiconductor Corp, AN2131QC Datasheet - Page 202

• Manufacturer Part Number: AN2131QC
• Description: IC MCU 8051 8K RAM 24MHZ 80BQFP
• Manufacturer: Cypress Semiconductor Corp
• Series: EZ-USB®r

Specifications of AN2131QC

• 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: 24
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 80-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 428-1307

These three registers control the three IO ports on the EZ-USB chip. They select between
IO ports and various alternate functions. They are read/write by the 8051.
When PORTnCFG=0, the port pin functions as IO, using the OUT, PINS, and OE control
bits. Data written to an OUTn registers appears on an IO Port pin if the corresponding
output enable bit (OEn) is HI.
When PORTnCFG=1, the pin assumes the alternate function shown in Table 12-4 on the
following page.
EZ-USB TRM v1.9
PORTACFG
PORTBCFG
PORTCCFG
12.6
RxD1OUT
T2OUT
R/W
R/W
R/W
RD
b7
b7
b7
0
0
0
Port Configuration
RxD0OUT
INT6
WR
R/W
R/W
R/W
b6
b6
b6
0
0
0
INT5
Figure 12-6. IO Port Configuration Registers
FRD
R/W
R/W
R/W
T1
b5
b5
b5
0
0
0
IO Port A Configuration
IO Port B Configuration
IO Port C Configuration
Chapter 12. EZ-USB Registers
FWR
INT4
R/W
R/W
R/W
T0
b4
b4
b4
0
0
0
TXD1
INT1
R/W
R/W
R/W
CS
b3
b3
b3
0
0
0
RXD1
INT0
R/W
R/W
R/W
OE
b2
b2
b2
0
0
0
T1OUT
T2EX
TXD0
R/W
R/W
R/W
b1
b1
b1
0
0
0
T0OUT
RXD0
Page 12-9
R/W
R/W
R/W
T2
b0
b0
b0
0
0
0
7F93
7F94
7F95