參數(shù)資料
型號(hào)： TLC155
廠商： Electronic Theatre Controls, Inc.
英文描述： EPROM/ROM-Based 8-Bit Microcontroller Series
中文描述： 存儲(chǔ)器/基于ROM的8位微控制器系列
文件頁(yè)數(shù)： 10/50頁(yè)
文件大?。?/td> 552K
代理商： TLC155
2.1.4 STATUS (Status Register)
Address
Name
03h (r/w)
STATUS
This register contains the arithmetic status of the ALU, the RESET status.
If the STATUS Register is the destination for an instruction that affects the Z, DC or C bits, then the write to these
three bits is disabled. These bits are set or cleared according to the device logic. Furthermore, the
TO
and
PD
bits
are not writable. Therefore, the result of an instruction with the STATUS Register as destination may be different
than intended. For example, CLRR STATUS will clear the upper three bits and set the Z bit. This leaves the
STATUS Register as 000u u1uu (where u = unchanged).
C
: Carry/borrow bit.
ADDAR, ADDIA
= 1, a carry occurred.
= 0, a carry did not occur.
SUBAR, SUBIA
= 1, a borrow did not occur.
= 0, a borrow occurred.
Note : A subtraction is executed by adding the two’s complement of the second operand. For rotate (RRR, RLR)
instructions, this bit is loaded with either the high or low order bit of the source register.
DC
: Half carry/half borrow bit.
ADDAR, ADDIA
= 1, a carry from the 4th low order bit of the result occurred.
= 0, a carry from the 4th low order bit of the result did not occur.
SUBAR, SUBIA
= 1, a borrow from the 4th low order bit of the result did not occur.
= 0, a borrow from the 4th low order bit of the result occurred.
Z
:
Zero bit.
= 1, the result of a logic operation is zero.
= 0, the result of a logic operation is not zero.
PD
: Power down flag bit.
= 1, after power-up or by the CLRWDT instruction.
= 0, by the SLEEP instruction.
TO
: Time overflow flag bit.
= 1, after power-up or by the CLRWDT or SLEEP instruction.
= 0, a watch-dog time overflow occurred.
GP2:GP0
: General purpose read/write bits.
2.1.5 FSR (Indirect Data Memory Address Pointer)
Address
Name
B7
B6
B5
04h (r/w)
FSR
RP1
RP0
Bit5:Bit0
: Select registers address in the indirect addressing mode. See 2.1.1 for detail description.
RP1:RP0
: For TLC154/155/156, these bits are not used. Read as “1”s.
For TLC157, these bits are used to switching the bank of four data memory banks. See 2.1.1 for
detail description.
B7
GP2
B6
GP1
B5
GP0
B4
TO
B3
PD
B2
Z
B1
DC
B0
C
B4
Indirect data memory address pointer
B3
B2
B1
B0
TLC
TLC156
Rev0.95 Nov 20, 2003
P.2/TLC156
相關(guān)PDF資料
PDF描述
TLC155D EPROM/ROM-Based 8-Bit Microcontroller Series
TLC155M EPROM/ROM-Based 8-Bit Microcontroller Series
TLC155P EPROM/ROM-Based 8-Bit Microcontroller Series
TLC156 EPROM/ROM-Based 8-Bit Microcontroller Series
TLC156D EPROM/ROM-Based 8-Bit Microcontroller Series
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