AN2131QC Cypress Semiconductor Corp, AN2131QC Datasheet - Page 41

• 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

Page 1-24
2131Q
24
19
20
68
69
70
2121S
2122S
2131S
N/A
N/A
N/A
N/A
8
9
2125S
2126S
2135S
2136S
N/A
N/A
N/A
N/A
8
9
2122T 2126T
N/A
N/A
N/A
10
34
9
Table 1-3. EZ-USB Series 2100 Pinouts by Pin Function
N/A
N/A
N/A
10
34
9
PA2 or OE#
T0OUT
T1OUT
PA0 or
PA1 or
Name
XOUT
Chapter 1. Introducing EZ-USB
XIN
EA
Output
Type
Input
Input
I/O
I/O
I/O
Default
(PA0)
(PA1)
(PA2)
N/A
N/A
N/A
I
I
I
External Access. If this signal is active (high), the
8051 fetches code from external memory instead of
the internal program RAM. If EA=0, the 8051
fetches code from external memory starting at
0x1B40 (AN2131).
Crystal Input. Connect this signal to a 12-MHz
series resonant, fundamental mode crystal and 22-
33-pF capacitor to GND. This pin may also be
driven by a 12-MHz clock.
Crystal Output. Connect this signal to a 12-MHz
series resonant, fundamental mode crystal and 22-
33-pF capacitor to GND. If XIN is driven by a 12-
MHz clock, this pin should not be connected.
Multiplexed pin whose function is selected by the
T0OUT bit of the PORTACFG register. If T0OUT=0,
the pin is the bi-directional I/O port bit PA0. If
T0OUT=1, the pin is the active-high T0OUT signal
from 8051 Timer/Counter0.
T0OUT outputs a high level for one CLK24 clock
cycle when Timer0 overflows. If Timer0 is operated
in mode 3 (two separate timer/counters), T0OUT is
active when the low byte timer/counter overflows.
Multiplexed pin whose function is selected by the
T1OUT bit of the PORTACFG register. If T1OUT=0,
the pin is the bi-directional I/O port bit PA1. If
T1OUT=1, the pin is the active-high T1OUT signal
from 8051 Timer-counter1
T1OUT outputs a high level for one CLK24 clock
cycle when Timer1 overflows. If Timer1 is operated
in mode 3 (two separate timer/counters), T1OUT is
active when the low byte timer/counter overflows.
Multiplexed pin whose function is selected by the OE
bit of the PORTACFG register. If OE=0, the pin is
the bi-directional I/O port pin PA2. If OE=1, the pin
is an active-low output enable for external memory.
If the OE# pin is used, it should be externally pulled
up to Vcc to ensure that the write strobe is inactive
(high) at power-on.
Description
EZ-USB TRM v1.9