AN2131QC Cypress Semiconductor Corp, AN2131QC Datasheet - Page 181

• 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

connected to Vcc through a 1 F capacitor and to GND through a 10-K resistor
(Figure 10-1). The oscillator and PLL are unaffected by the state of the RESET pin.
The CLK24 signal is active while RESET = HI. When RESET returns LO, the activity on
the CLK24 pin depends on whether or not the EZ-USB chip is in suspend state. If in sus-
pend, CLK24 stops. Resumption of USB bus activity or asserting the WAKEUP# pin LO
re-starts the CLK24 signal.
Power-on default values for all EZ-USB register bits are shown in Chapter 12, "EZ-USB
Registers." Table 10-1 summarizes reset states that affect USB device operation. Note
that the term “Power-On Reset” refers to a reset initiated by application of power, or by
assertion of the RESET pin.
* When the 8051 is released from reset, the EZ-USB automatically arms the Bulk OUT
Page 10-2
endpoints by setting their CS registers to 000000010b.
Item
10
12
13
14
15
16
17
18
19
20
21
11
1
2
3
4
5
6
7
8
9
Endpoint Data
Byte Counts
CPUCS
PORT Configs
PORT Registers
PORT OEs
Interrupt Enables
Interrupt Reqs
Bulk IN C/S
Bulk OUT C/S*
Toggle Bits
USBCS
FNADDR
IN07VAL
OUT07VAL
INISOVAL
OUTISOVAL
USBPAIR
USBBAV
Configuration
Alternate Setting
Table 10-1. EZ-USB States After Power-On Reset (POR)
Register
xxxxxxxx
xxxxxxxx
00000000
xxxxxxxx
00000000
00000000
00000000
00000000
00000000
0x000000
00000000
0
0
rrrr0011
00000000
00000100
00000000
01010111
01010101
00000111
00000111
Default Value
Chapter 10. EZ-USB Resets
rrrr=rev number, b1 =CLK24OE, b0=8051RES
IO, not alternate functions
Inputs
Disabled
Cleared
Bulk IN endpoints not busy (unarmed)
Bulk OUT endpoints not busy (unarmed)
Data toggles = 0
RENUM=0, DISCOE=1 (Discon pin drives)
USB Function Address
EP0,1,2,4,6 IN valid
EP0,2,4,6 OUT valid
EP8,9,10 IN valid
EP8,910OUT valid
ISOsend0 (b7) = 0, no pairing
Break condition cleared, no Autovector
Internal EZ-USB core value
Internal EZ-USB core value
Comment
EZ-USB TRM v1.9