AN2135SC Cypress Semiconductor Corp, AN2135SC Datasheet - Page 283

• Manufacturer Part Number: AN2135SC
• Description: IC MCU 8051 8K RAM 24MHZ 44QFP
• Manufacturer: Cypress Semiconductor Corp
• Series: EZ-USB®r

Specifications of AN2135SC

• 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: 8
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 44-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 428-1308

B.1.2 Instruction Set
All 8051 instructions are binary code compatible and perform the same functions as they do
with the industry standard 8051. The effects of these instructions on bits, flags, and other
status functions is identical to the industry standard 8051. However, the timing of the
instructions is different, both in terms of number of clock cycles per instruction cycle and
timing within the instruction cycle.
Figure B-2 lists the 8051 instruction set and the number of instruction cycles required to
complete each instruction. Table B-1. defines the symbols and mnemonics used in Table B-2.
EZ-USB v1.9
Bank
Select
(PSW bits
4,3)
11
10
01
00
7Fh
30h
2Fh
20h
1Fh
18h
17h
10h
0Fh
08h
07h
00h
7F
07
Lower 128 bytes
Bit-Addressable
Registers
.
.
.
Direct RAM
Bank 0
Bank 3
Bank 2
Bank 1
. . .
. . .
Appendix B: 8051 Architectural Overview
78
00
Figure B-2 Internal RAM Organization
00h
FFh
80h
7Fh
Upper 128
bytes
(optional)
Lower 128
bytes
Direct or indirect addressing
Indirect addressing only
Direct addressing only
SFR space
FFh
80h
B - 3