C8051F537-IT Silicon Laboratories Inc, C8051F537-IT Datasheet - Page 92

• Manufacturer Part Number: C8051F537-IT
• Description: IC 8051 MCU 2K FLASH 20TSSOP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F53xr

Specifications of C8051F537-IT

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 16
• Program Memory Size: 2KB (2K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.25 V
• Data Converters: A/D 16x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 20-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Other names: 336-1401

C8051F52x/F52xA/F53x/F53xA
9. Memory Organization and SFRs
The memory organization of the C8051F52x/F52xA/F53x/F53xA is similar to that of a standard 8051.
There are two separate memory spaces: program memory and data memory. Program and data memory
share the same address space but are accessed via different instruction types. The memory map is shown
in Figure 9.1.
9.1. Program Memory
The CIP-51 core has a 64 kB program memory space. The C8051F520/0A/1/1A and C8051F530/0A/1/1A
implement 8 kB of this program memory space as in-system, re-programmable Flash memory, organized
in a contiguous block from addresses 0x0000 to 0x1FFF. Addresses above 0x1DFF are reserved on the
8 kB devices. The C8051F523/3A/4/4A and C8051F533/3A/4/4A implement 4 kB of Flash from addresses
0x0000 to 0x0FFF. The C8051F526/6A/7/7A and C8051F536/6A/7/7A implement 2 kB of Flash from
addresses 0x0000 to 0x07FF.
Program memory is normally assumed to be read-only. However, the C8051F52x/F52xA/F53x/F53xAcan
write to program memory by setting the Program Store Write Enable bit (PSCTL.0) and using the MOVX
write instruction. This feature provides a mechanism for updates to program code and use of the program
memory space for non-volatile data storage. Refer to Section “12. Flash Memory” on page 112 for further
details.
92
0x1DFF
0x0FFF
0x1E00
0x07FF
0x0000
0x1000
0x0000
0x0800
0x0000
PROGRAM/DATA MEMORY
'F520/0A/1/1A and 'F530/0A/1/1A
'F523/3A/4/4A and 'F533/3A/4/4A
'F526/6A/7/7A and 'F536/6A/7/7A
Programmable in 512
Programmable in 512
Programmable in 512
Byte Sectors)
Byte Sectors)
Byte Sectors)
RESERVED
RESERVED
RESERVED
(In-System
(In-System
(In-System
8 kB Flash
4 kB Flash
2 kB Flash
(Flash)
Figure 9.1. Memory Map
0xFF
0x80
0x7F
0x30
0x2F
0x20
0x1F
0x00
Rev. 1.3
(Indirect Addressing
(Direct and Indirect
INTERNAL DATA ADDRESS SPACE
General Purpose
Upper 128 RAM
Bit Addressable
Addressing)
Registers
Only)
DATA MEMORY (RAM)
(Direct Addressing Only)
Special Function
Lower 128 RAM
(Direct and Indirect
Addressing)
Register's