C8051F321R Silicon Laboratories Inc, C8051F321R Datasheet - Page 79
C8051F321R
Manufacturer Part Number
C8051F321R
Description
IC 8051 MCU 16K FLASH 28MLP
Manufacturer
Silicon Laboratories Inc
Series
C8051F32xr
Datasheet
1.C8051F320R.pdf
(256 pages)
Specifications of C8051F321R
Core Processor
8051
Core Size
8-Bit
Speed
25MHz
Connectivity
SMBus (2-Wire/I²C), SPI, UART/USART, USB
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o
21
Program Memory Size
16KB (16K x 8)
Program Memory Type
FLASH
Ram Size
2.25K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 13x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
28-VQFN Exposed Pad, 28-HVQFN, 28-SQFN, 28-DHVQFN
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Other names
336-1067-2
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9.2.
The memory organization of the CIP-51 System Controller is similar to that of a standard 8051. There are two sepa-
rate 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 9.2.
9.2.1. Program Memory
The CIP-51 core has a 64k-byte program memory space. The C8051F320/1 implements 16k bytes of this program
memory space as in-system, re-programmable FLASH memory, organized in a contiguous block from addresses
0x0000 to 0x3FFF. Addresses above 0x3DFF are reserved.
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 provides a mechanism
for the CIP-51 to update program code and use the program memory space for non-volatile data storage. Refer to
tion “11. FLASH Memory” on page 107
Memory Organization
0x3DFF
0x3E00
0x0000
PROGRAM/DATA MEMORY
Programmable in 512
Byte Sectors)
RESERVED
16K FLASH
(In-System
(FLASH)
Figure 9.2. Memory Map
for further details.
0xFFFF
0x07FF
0x03FF
0x0800
0x0400
0x0000
0xFF
0x7F
0x2F
0x1F
0x80
0x30
0x20
0x00
0x0000 to 0x07FF, wrapped
XRAM - 1024 Bytes
Rev. 1.1
Same 2048 bytes as from
(accessable using MOVX
(Indirect Addressing
on 2K-byte boundaries
(Direct and Indirect
INTERNAL DATA ADDRESS SPACE
EXTERNAL DATA ADDRESS SPACE
General Purpose
Upper 128 RAM
Bit Addressable
USB FIFOs
1024 Bytes
Addressing)
instruction)
Registers
Only)
DATA MEMORY (RAM)
(Direct Addressing Only)
Special Function
Lower 128 RAM
(Direct and Indirect
Addressing)
Register's
C8051F320/1
Sec-
79
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