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INDEX
Index-7
RETI instruction, 6-1, 6-14, 6-15, A-24
Return instructions, 5-15
RL instruction, A-17
RLC instruction, A-17
ROM (on-chip), 14-1
verifying, 14-1–14-9
See also On-chip code memory, Configuration
bytes, Lock bits, Encryption array,
Signature bytes.
Rotate instructions, 5-9
RR instruction, A-17
RRC instruction, A-17
RST, 11-6, 11-7
exiting idle mode, 12-5
exiting powerdown mode, 12-6
ONCE mode, 12-7
power-on reset, 11-7
programming and verifying nonvolatile
memory, 14-3
RTWCE (Real Time WAIT CLOCK Enable) Bit,
13-12
RTWE (Real Time WAIT# Enable) Control Bit,
13-12
RXD, 7-1, 10-1
mode 0, 10-4
modes 1, 2, 3, 10-6
S
SADDR, 3-17, 3-19, 10-2, 10-8, 10-9, 10-10, C-2,
C-4, C-22
SADEN, 3-17, 3-19, 10-2, 10-8, 10-9, 10-10, C-2,
C-4, C-23
SBUF, 3-17, 3-19, 10-2, 10-4, 10-5, C-2, C-4, C-23
SCON, 3-17, 3-19, 10-2, 10-3, 10-4, 10-5, 10-6,
10-7, C-2, C-4, C-24, C-25
bit definitions, 10-3
interrupts, 6-5
Security, 14-2
Serial I/O port, 10-1–10-14
asynchronous modes, 10-6
automatic address recognition, 10-7–10-10
baud rate generator, 8-8
baud rate, mode 0, 10-4, 10-10
baud rate, modes 1, 2, 3, 10-6, 10-10–10-14
broadcast address, 10-9
data frame, modes 1, 2, 3, 10-6
framing bit error detection, 10-7
full-duplex, 10-6
given address, 10-8
half-duplex, 10-4
interrupts, 10-1, 10-8
mode 0, 10-4–10-5
modes 1, 2, 3, 10-6
multiprocessor communication, 10-7
SFRs, 3-19, 10-1, 10-2, C-4
synchronous mode, 10-4
timer 1 baud rate, 10-11, 10-12
timer 2 baud rate, 10-12–10-14
timing, mode 0, 10-5
SETB instruction, 5-11, A-23
SFRs
accessing, 3-16
address space, 3-1, 3-2
idle mode, 12-4
map, 3-17, C-2
MCS 51 architecture, 3-4
powerdown mode, 12-5
reset initialization, 11-6
reset values, 3-16
tables of, 3-18
unimplemented, 3-2, 3-16
Shift instruction, 5-9
Signal descriptions, B-3
Signature bytes
values, 14-8
verifying, 14-1, 14-8
SJMP instruction, 5-15, A-24
SLL instruction, 5-9, A-17
Software
application notes, 1-6
Source register, 5-3
SP, 3-15, 3-17, 3-18, C-2, C-3, C-25
Special function registers See SFRs
SPH, 3-15, 3-17, 3-18, C-2, C-3, C-26
SPX, 3-13, 3-15
SRA instruction, 5-9, A-18
SRL instruction, 5-9, A-18
State time, 2-6
SUB instruction, 5-8, A-14
SUBB instruction, 5-8, A-14
SWAP instruction, 5-9, A-18
T
T1:0, 7-1, 8-3