Owner's manual

4-35
TL2.7–0
Bits 7–0
Timer 2 LSB. This register contains the least significant byte of Timer 2.
TH2.7–0
Bits 7–0
Timer 2 MSB. This register contains the most significant byte of Timer 2.
CY
Bit 7
AC
Bit 6
F0
Bit 5
RS1, RS0
Bits 4-3
Carry Flag. This bit is set if the last arithmetic operation resulted in a carry (during addition) or a
borrow (during subtraction). Otherwise, it is cleared to 0 by all arithmetic operations.
Auxiliary Carry Flag. This bit is set to 1 if the last arithmetic operation resulted in a carry into (dur-
ing addition) or a borrow (during subtraction) from the high-order nibble. Otherwise, it is cleared to
0 by all arithmetic operations.
User Flag 0. This is a bit-addressable, general-purpose flag for software control.
Register Bank Select 1–0. These bits select which register bank is addressed during register
accesses.
R = Unrestricted read, W = Unrestricted write, -n = Value after reset
Program Status Word (PSW)
76 5 4 3 2 1 0
SFR D0h CY AC F0 RS1 RS0 OV F1 PARITY
RW-0 RW-0 RW-0 RW-0 RW-0 RW-0 RW-0 RW-0
Table 4-19. Register Bank Addresses
RS1 RS0
REGISTER BANK
ADDRESS
0 0 0 00h – 07h
0 1 1 08h – 0Fh
1 0 2 10h – 17h
1 1 3 18h – 1Fh
OV
Bit 2
F1
Bit 1
PARITY
Bit 0
Overflow Flag. This bit is set to 1 if the last arithmetic operation resulted in a carry (addition), bor-
row (subtraction), or overflow (multiplication or division). Otherwise it is cleared to 0 by all arith-
metic operations.
User Flag 1. This is a bit-addressable, general-purpose flag for software control.
Parity Flag. This bit is set to 1 if the module-2 sum of the 8 bits of the accumulator is 1 (odd parity)
and clear
ed to 0 on even parity.
R = Unrestricted read, W = Unrestricted write, -n = Value after reset
Timer 2 MSB (TH2)
76543210
SFR CDh TH2.7 TH2.6 TH2.5 TH2.4 TH2.3 TH2.2 TH2.1 TH2.0
RW-0 RW-0 RW-0 RW-0 RW-0 RW-0 RW-0 RW-0
R = Unrestricted read, W = Unrestricted write, -n = Value after reset
Timer 2 LSB (TL2)
7 6543210
SFR CCh TL2.7 TL2.6 TL2.5 TL2.4 TL2.3 TL2.2 TL2.1 TL2.0
RW-0 RW-0 RW-0 RW-0 RW-0 RW-0 RW-0 RW-0
Ultra-High-Speed Flash
Microcontroller User’s Guide
Maxim Integrated