C8051F326 View Datasheet(PDF) - Silicon Laboratories

Part Name

Description

Manufacturer

C8051F326

Full Speed USB, 16 kB Flash MCU Family

Silicon Laboratories 

C8051F326/7

1.2. On-Chip Memory

The CIP-51 has a standard 8051 program and data address configuration. It includes 256 bytes of data

RAM, with the upper 128 bytes dual-mapped. Indirect addressing accesses the upper 128 bytes of general

purpose RAM, and direct addressing accesses the 128 byte SFR address space. The lower 128 bytes of

RAM are accessible via direct and indirect addressing. The first 32 bytes are addressable as four banks of

general purpose registers, and the next 16 bytes can be byte addressable or bit addressable.

Program memory consists of 16k bytes of Flash. This memory may be reprogrammed in-system in 512

byte sectors, and requires no special off-chip programming voltage. See Figure 1.7 for the MCU system

memory map.

PROGRAM/DATA MEMORY

(FLASH)

0x3FFF

0x3E00

RESERVED

0x3DFF

0xFF

0x80

0x7F

16K FLASH

(In-System

Programmable in 512

Byte Sectors)

0x30

0x2F

0x20

0x1F

0x00

DATA MEMORY (RAM)

INTERNAL DATA ADDRESS SPACE

Upper 128 RAM

(Indirect Addressing

Only)

Special Function

Register's

(Direct Addressing Only)

(Direct and Indirect

Addressing)

Bit Addressable

General Purpose

Registers

Lower 128 RAM

(Direct and Indirect

Addressing)

0x0000

EXTERNAL DATA ADDRESS SPACE

0xFFFF

Same 1024 bytes as from

0x0000 to 0x03FF, wrapped

on 1K-byte boundaries

USB FIFOs

256 Bytes

Accessible through

USB Registers Only

0x0400

0x03FF

0x0000

XRAM - 1024 Bytes

(accessable using MOVX

instruction)

Figure 1.7. On-Board Memory Map

Rev. 1.1

19

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