Rainbow Electronics AT89C5132 - Manual

Rev. 4253A–USB–08/03
Active AT89C5132 Errata List
• SPI Controller – Bad Transfer in Slave Mode with CPHA = 0
• C51 Core – Bad Exit of Power-down in X2 Mode
AT89C5132 Errata History
AT89C5132 Errata Description
1. SPI Controller – Bad Transfer in Slave Mode with CPHA = 0
SPI controller used in slave mode with CPHA = 0 leads to erratic data reception
and transmission.
Workaround
Use slave mode only with CPHA = 1.
2. C51 Core – Bad Exit of Power-down in X2 Mode
When exiting Power-down mode by interrupt while CPU is in X2 mode, it leads to
bad execution of first instruction executed when CPU restarts.
Workaround
Put the CPU in X1 mode just before entering power-down mode.
Lot Number Errata List
A00960 and above 1, 2
USB
Microcontrollers
AT89C5132
Errata Sheet