P R E L I M I N A R Y
RTS0/RTR0/PIO20 ........................................................................................................ 35
RXD0/PIO23 .................................................................................................................. 35
RXD1/PIO28 .................................................................................................................. 35
S2–S0 ............................................................................................................................ 35
S6/LOCK/CLKDIV2/PIO29 ............................................................................................. 36
SRDY/PIO6 .................................................................................................................... 36
TMRIN0/PIO11 .............................................................................................................. 36
TMRIN1/PIO0 ................................................................................................................ 36
TMROUT0/PIO10 .......................................................................................................... 36
TMROUT1/PIO1 ............................................................................................................ 36
TXD0/PIO22 ................................................................................................................... 36
TXD1/PIO27 ................................................................................................................... 36
UCS/ONCE1 .................................................................................................................. 36
UZI/PIO26 ...................................................................................................................... 37
V
................................................................................................................................ 37
CC
WHB (Am186ES Microcontroller Only) .......................................................................... 37
WLB (Am186ES Microcontroller Only) ........................................................................... 37
WB (Am188ES Microcontroller Only) ............................................................................. 37
WR ................................................................................................................................. 37
X1 ................................................................................................................................... 37
X2 ................................................................................................................................... 37
Functional Description ................................................................................................................ 38
Bus Operation ............................................................................................................................ 39
Bus Interface Unit ...................................................................................................................... 41
Peripheral Control Block (PCB) ................................................................................................. 42
Clock and Power Management .................................................................................................. 44
Chip-Select Unit ......................................................................................................................... 46
Refresh Control Unit .................................................................................................................. 47
Interrupt Control Unit ................................................................................................................. 48
Timer Control Unit ...................................................................................................................... 48
Direct Memory Access (DMA) ................................................................................................... 49
Pulse Width Demodulation ........................................................................................................ 51
Asynchronous Serial Ports ........................................................................................................ 51
Programmable I/O (PIO) Pins .................................................................................................... 52
Absolute Maximum Ratings ....................................................................................................... 53
Operating Ranges ...................................................................................................................... 53
DC Characteristics Over Commercial Operating Ranges .......................................................... 53
Commercial Switching Characteristics and Waveforms ............................................................ 61
TQFP Physical Dimensions........................................................................................................ 98
PQFP Physical Dimensions...................................................................................................... 100
6
Am186/188ES and Am186/188ESLV Microcontrollers
AMD [ AMD ]
