User guide

Arch Meter Corporation PS1000 Ver1.2
PS1000Rev. 1.2 May 2006
15/ 67
www.archmeter.com
5. I/O Mapping
For the XDATA memory, address 0xF000 to 0xFFFF is mapping to the DSP
and some special control register. The address 0xF000 ~ 0xF3FF(1KB) is mapped
to DSPROM address. MCU can access this address by setting MCUCFG.DSPROM
as ‘1’. When MCUCFG.DSPROM is setting as ‘0’. This address can not be access.
The address 0xFC00~0xFCFF (256 bytes) is mapped to the DSP data buffer
and the 0xFE00~0xFE7F (128 bytes) is mapped to the I/O configuration. These use
for store the DSP calculation data and system configuration registers. Detail
description, please reference the relative section.
The memory mapping is shown as follow.