AM186ES Advanced Micro Devices, AM186ES Datasheet - Page 69

• Manufacturer Part Number: AM186ES
• Description: microcontrollers provide a low-cost/ high-performance solution for embedded system designers who wish to use the x86 architecture.
• Manufacturer: Advanced Micro Devices

Table 4-3
Initial Register State After Reset
Register Name
Processor Status Flags
Instruction Pointer
Code Segment
Data Segment
Extra Segment
Stack Segment
Processor Release Level
Auxiliary Configuration
System Configuration
Peripheral Control Block
Relocation
Memory Partition
Enable RCU
Upper Memory Chip Select
Low Memory Chip Select
Serial Port 1 Control
Serial Port 0 Control
Serial Port 0 Baud Rate
Divisor
Serial Port 1 Baud Rate
Divisor
PIO Direction 1
PIO Mode 1
PIO Direction 0
PIO Mode 0
Timer 2 Mode/Control
Timer 1 Mode/Control
Timer 0 Mode/Control
Serial Port 1 Interrupt Control SP1CON
Serial Port 0 Interrupt Control SP0CON
INT4 Control
INT3 Control
INT2 Control
Peripheral Control Block
Mnemonic
FLAGS
IP
CS
DS
ES
SS
PRL
AUXCON
SYSCON
RELREG
MDRAM
EDRAM
UMCS
LMCS
SP1CT
SP0CT
SP0BAUD
SP1BAUD
PIODIR1
PIOMODE1 0000h
PIODIR0
PIOMODE0 0000h
T2CON
T1CON
T0CON
I4CON
I3CON
I2CON
Value at
Reset
F002h
0000h
FFFFh
0000h
0000h
0000h
XXxxh
0000h
0000h
20FFh
0000h
0000h
F03Bh
Undefined
0000h
0000h
0000h
0000h
FFFFh
FC0Fh
0000h
0000h
0000h
001Fh
001Fh
000Fh
000Fh
000Fh
Comments
Interrupts disabled
Boot address is FFFF0h
DS = ES = SS = 0000h
PRL XX = Revision (lower half-word is
undefined)
Peripheral control block located at
FF00h in I/O space and interrupt
controller in master mode
Refresh base address is 00000h
Refresh disabled, counter = 0
UCS active for 64K from F0000h to
FFFFFh, 3 wait states, external Ready
signal required
Serial port interrupts disabled, no
loopback, no break, BRKVAL low, no
parity, word length = 7, 1 stop bit,
transmitter and receiver disabled
Serial port interrupts disabled, no
loopback, no break, BRKVAL low, no
parity, word length = 7, 1 stop bit,
transmitter and receiver disabled
Serial port interrupt masked, priority 7
Serial port interrupt masked, priority 7
INT4 interrupt masked, edge-triggered,
priority 7
INT3 interrupt masked, edge-triggered,
priority 7
INT2 interrupt masked, edge-triggered,
priority 7
4-9