CY7C68013-56LFC Cypress Semiconductor Corp, CY7C68013-56LFC Datasheet - Page 4

• Manufacturer Part Number: CY7C68013-56LFC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C68013-56LFC

• Cpu Family: FX2LP
• Device Core: 8051
• Device Core Size: 8b
• Frequency (max): 48MHz
• Interface Type: USB
• Program Memory Type: ROMLess
• Program Memory Size: Not Required
• Total Internal Ram Size: 8KB
• # I/os (max): 24
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.6V
• Operating Supply Voltage (min): 3V
• Instruction Set Architecture: CISC
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 56
• Package Type: QFN EP
• Lead Free Status / Rohs Status: Not Compliant

3.8
3.8.1
FX2 implements an autovector feature for INT2 and INT4.
There are 27 INT2 (USB) vectors, and 14 INT4 (FIFO/GPIF)
vectors. See FX2 TRM for more details.
3.8.2
The main USB interrupt is shared by 27 interrupt sources. To
save the code and processing time that normally would be
required to identify the individual USB interrupt source, the
FX2 provides a second level of interrupt vectoring, called
Table 3-3. INT2 USB Interrupts
Document #: 38-08012 Rev. *F
Priority
10
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
11
1
2
3
4
5
6
7
8
9
Interrupt System
INT2 Interrupt Request and Enable Registers
USB-Interrupt Autovectors
INT2VEC Value
0C
1C
2C
3C
4C
5C
6C
7C
10
14
18
20
24
28
30
34
38
40
44
48
50
54
58
60
64
68
70
74
78
00
04
08
SUDAV
SOF
SUTOK
SUSPEND
USB RESET
HISPEED
EP0ACK
EP0-IN
EP0-OUT
EP1-IN
EP1-OUT
EP2
EP4
EP6
EP8
IBN
EP0PING
EP1PING
EP2PING
EP4PING
EP6PING
EP8PING
ERRLIMIT
EP2ISOERR
EP4ISOERR
EP6ISOERR
EP8ISOERR
Source
USB Interrupt Table for INT2
SETUP Data Available
Start of Frame (or microframe)
Setup Token Received
USB Suspend request
Bus reset
Entered high-speed operation
FX2 ACK’d the CONTROL Handshake
reserved
EP0-IN ready to be loaded with data
EP0-OUT has USB data
EP1-IN ready to be loaded with data
EP1-OUT has USB data
IN: buffer available. OUT: buffer has data
IN: buffer available. OUT: buffer has data
IN: buffer available. OUT: buffer has data
IN: buffer available. OUT: buffer has data
IN-Bulk-NAK (any IN endpoint)
reserved
EP0 OUT was Pinged and it NAK’d
EP1 OUT was Pinged and it NAK’d
EP2 OUT was Pinged and it NAK’d
EP4 OUT was Pinged and it NAK’d
EP6 OUT was Pinged and it NAK’d
EP8 OUT was Pinged and it NAK’d
Bus errors exceeded the programmed limit
reserved
reserved
reserved
ISO EP2 OUT PID sequence error
ISO EP4 OUT PID sequence error
ISO EP6 OUT PID sequence error
ISO EP8 OUT PID sequence error
Autovectoring. When a USB interrupt is asserted, the FX2
pushes the program counter onto its stack then jumps to
address 0x0043, where it expects to find a “jump” instruction
to the USB Interrupt service routine.
The FX2 jump instruction is encoded as shown in Table 3-3.
If Autovectoring is enabled (AV2EN = 1 in the INTSETUP
register), the FX2 substitutes its INT2VEC byte. Therefore, if
the high byte (“page”) of a jump-table address is preloaded at
location 0x0044, the automatically-inserted INT2VEC byte at
0x0045 will direct the jump to the correct address out of the 27
addresses within the page.
Notes
CY7C68013
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