C8051F326 Datasheet, PDF (18/140 Pages) List of Unclassifed Manufacturers – Full Speed USB, 16 kB Flash MCU Family

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 16 bytes of Flash. This memory may be reprogrammed in-system in 512 byte
sectors, and requires no special off-chip programming voltage. See Figure 1.5 for the MCU system mem-
ory 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 1.5. On-Board Memory Map
18
Rev. 0.5