C8051F317-GMR Silicon Laboratories Inc, C8051F317-GMR Datasheet - Page 85

• Manufacturer Part Number: C8051F317-GMR
• Description: MCU 8-Bit C8051F31x 8051 CISC 16KB Flash 3.3V 24-Pin QFN EP T/R
• Manufacturer: Silicon Laboratories Inc

Specifications of C8051F317-GMR

• Package: 24QFN EP
• Device Core: 8051
• Family Name: C8051F31x
• Maximum Speed: 25 MHz
• Ram Size: 1.25 KB
• Program Memory Size: 16 KB
• Operating Supply Voltage: 3.3 V
• Data Bus Width: 8 Bit
• Program Memory Type: Flash
• Number Of Programmable I/os: 21
• Interface Type: I2C/SMBus/SPI/UART
• On-chip Adc: 17-chx10-bit
• Operating Temperature: -40 to 85 °C
• Number Of Timers: 4

8.2.
The memory organization of the CIP-51 System Controller 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 CIP-51 memory organization is
shown in Figure 8.2.
8.2.1. Program Memory
The CIP-51 core has a 64k-byte program memory space. The C8051F310/1 and C8051F312/3/4/5 imple-
ment 16 and 8 kB, respectively, of this program memory space as in-system, re-programmable Flash
memory, organized in a contiguous block from addresses 0x0000 to 0x3FFF or 0x0000 to 0x1FFF.
Addresses above 0x3E00 are reserved on the 16 kB devices.
Program memory is normally assumed to be read-only. However, the CIP-51 can write to program memory
by setting the Program Store Write Enable bit (PSCTL.0) and using the MOVX instruction. This feature pro-
vides a mechanism for the CIP-51 to update program code and use the program memory space for non-
volatile data storage. Refer to
Memory Organization
0x3DFF
0x1FFF
0x3E00
0x0000
0x2000
0x0000
PROGRAM/DATA MEMORY
Programmable in 512
Programmable in 512
C8051F312/3/4/5
C8051F310/1
Byte Sectors)
Byte Sectors)
RESERVED
RESERVED
16 kB Flash
(In-System
(In-System
8 kB Flash
(Flash)
Section “10. Flash Memory” on page 111
Figure 8.2. Memory Map
0xFFFF
0x03FF
0x0400
0x0000
0xFF
0x80
0x7F
0x30
0x2F
0x20
0x1F
0x00
Rev. 1.7
XRAM - 1024 Bytes
0x0000 to 0x03FF, wrapped
(accessable using MOVX
Same 1024 bytes as from
(Indirect Addressing
C8051F310/1/2/3/4/5/6/7
(Direct and Indirect
INTERNAL DATA ADDRESS SPACE
EXTERNAL DATA ADDRESS SPACE
General Purpose
Upper 128 RAM
on 1 kB boundaries
Bit Addressable
Addressing)
instruction)
Registers
Only)
DATA MEMORY (RAM)
for further details.
(Direct Addressing Only)
Special Function
Lower 128 RAM
(Direct and Indirect
Addressing)
Register's
85