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Index I-1
INDEX
A
A1 signal (Latched Address Bit 1), 3-8
A19-A0 signals (Address Bus), 3-1
A2 signal (Latched Address Bit 2), 3-9
AD15-AD8 signals (Address and Data Bus), 3-2
AD7-AD0 signals (Address and Data Bus), 3-1
Address generation, 2-3
Addressing modes, 2-10
ADEN signal (Address Enable), 3-3, 3-12
AF bit (Auxiliary Carry)
Processor Status Flags Register, 2-3
ALE signal (Address Latch Enable), 3-2
ALT bit (Alternate Compare Bit)
Timer 0 Mode/Control Register, 9-4
Timer 1 Mode/Control Register, 9-4
Am186ER Microcontroller
address generation, 2-3
addressing modes, 2-10
application considerations, 1-6
block diagram, 1-4
clock generation, 1-6
data types, 2-8
distinctive characteristics, 1-2
I/O space, 2-4
instruction set, 2-4
key features and benefits, 1-1
memory interface, 1-7
memory operands, 2-10
memory organization, 2-3
product support, iii
register and immediate operands, 2-10
register set, 2-1
segment registers, 2-8
serial port, 1-7
signal descriptions, 3-1
Am188ER Microcontroller
block diagram, 1-5
signal descriptions
RFSH2/ADEN (Refresh 2/Address Enable), 3-12
WB (Write Byte), 3-16
AO15-AO7 signals (Address-Only Bus), 3-2
Application considerations, 1-6
ARDY signal (Asynchronous Ready), 3-3
ASCII data type, 2-8
Auxiliary Carry bit, 2-3
B
B/W bit (Byte/Word Select), 10-4
BA19-BA11 field (Base Address)
Peripheral Chip Select Register, 5-12
BA19-BA13 field (Base Address)
Midrange Memory Chip Select Register, 5-8
BA19-BA15 field (Base Address)
Internal Memory Chip Select Register, 6-3
Base and index registers, 2-1
Based Indexed mode addressing, 2-10
Based mode addressing, 2-10
Basic functional system, 1-6–1-7
BAUDDIV field (Baud Rate Divisor), 11-7
BHE signal (Bus High Enable), 3-3
Binary-coded decimal (BCD) data type, 2-8
Bits
AF (Auxiliary Carry), 2-3
ALT (Alternate Compare Bit), 9-4
B/W (Byte/Word Select), 10-4
BA19-BA11 (Base Address), 5-12
BA19-BA13 (Base Address), 5-8
BA19-BA15 (Base Address), 6-3
BAUDDIV (Baud Rate Divisor), 11-7
BRK (Send Break), 11-2
BRKI (Break Interrupt), 11-4
BRKVAL (Break Value), 11-2
C (Cascade Mode), 8-14
CAD (CLKOUTA Drive Disable), 4-7
CAF (CLKOUTA Output Frequency), 4-7
CBD (CLKOUTB Drive Disable), 4-7
CBF (CLKOUTB Output Frequency), 4-7
CF (Carry Flag), 2-3
CHG (Change Start Bit), 10-4
CONT (Continuous Mode Bit), 9-4–9-5
D1-D0 (DMA Channel Interrupt In-Service), 8-23, 8-
33, 8-35
D1-D0 (DMA Channel Interrupt Masks), 8-25
D1-D0 (DMA Channel Interrupt Request), 8-22, 8-32
DA (Address Disable), 5-5, 5-7
DDA15-DDA0 (DMA Destination Address Low), 10-
7
DDA19-DDA16 (DMA Destination Address High),
10-6
DDEC (Destination Decrement), 10-3
DE0 (SDEN0 Enable), 12-4
DE1 (SDEN1 Enable), 12-4
DF (Direction Flag), 2-2