Rainbow Electronics T89C5121 - Manual (Page 113)

ii
4164G–SCR–07/06
A/T8xC5121
Memory Management ......................................................................... 60
Program Memory ................................................................................................ 60
In-System Programming ..................................................................................... 63
Protection Mechanisms ...................................................................................... 66
Autobaud ............................................................................................................ 71
Protection Mechanisms ...................................................................................... 71
Timers/Counters ................................................................................. 73
Introduction ......................................................................................................... 73
Timer 0/Counter Operations ............................................................................... 73
Timer 0.................................................................................................................74
Timer 1.................................................................................................................77
Registers............................................................................................................. 78
Serial I/O Port ...................................................................................... 81
Framing Error Detection ..................................................................................... 81
Automatic Address Recognition.......................................................................... 82
UART Output Configuration................................................................................ 84
UART Control Registers ..................................................................................... 85
UART Timings ..................................................................................... 86
Mode Selection ................................................................................................... 86
Baud Rate Generator.......................................................................................... 86
Asynchronous Modes (Modes 1, 2 and 3) ...........................................................89
Hardware Watchdog Timer ................................................................ 96
Using the WDT ................................................................................................... 96
WDT during Power-down and Idle...................................................................... 97
Electrical Characteristics ................................................................... 98
Absolute Maximum Ratings ............................................................................... 98
DC Parameters ................................................................................................... 98
Typical Application ........................................................................... 105
Ordering Information........................................................................ 107
Package Drawings............................................................................ 108
SSOP24............................................................................................................ 108
PLCC52 .............................................................................................................109
QFN32 ...............................................................................................................110
Document Revision History for T8xC5121 ..................................... 111
Changes from 4164B -06/02 to 4164C - 07/03................................................. 111
Changes from 4164C - 07/03 to 4164D - 12/03................................................ 111
Changes from 4164D - 12/03 to 4164E - 01/04................................................ 111