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TLC154R 数据表(PDF) 8 Page - List of Unclassifed Manufacturers

部件名 TLC154R
功能描述  EPROM/ROM-Based 8-Bit Microcontroller Series
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制造商  ETC1 [List of Unclassifed Manufacturers]
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标志 ETC1 - List of Unclassifed Manufacturers

TLC154R 数据表(HTML) 8 Page - List of Unclassifed Manufacturers

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FIGURE 2.2: Direct/Indirect Addressing for TLC157
Direct Addressing
Indirect Addressing
RP1:RP0
5
from opcode
0
5 from FSR register 0
0 0
0 1
1 0
1 1
location select
00h
location select
addressing INDF register
3Fh
2.1.2 TMR0 (Time Clock/Counter register)
Address
Name
B7
B6
B5
B4
B3
B2
B1
B0
01h (r/w)
TMR0
8-bit real-time clock/counter
The Timer0 is a 8-bit timer/counter. The clock source of Timer0 can come from the instruction cycle clock or by an
external clock source (T0CKI pin) defined by T0CS bit (OPTION<5>). If T0CKI pin is selected, the Timer0 is
increased by T0CKI signal rising/falling edge (selected by T0SE bit (OPTION<4>)).
The prescaler is assigned to Timer0 by clearing the PSA bit (OPTION<3>). In this case, the prescaler will be cleared
when TMR0 register is written with a value.
2.1.3 PCL (Low Bytes of Program Counter) & Stack
Address
Name
B7
B6
B5
B4
B3
B2
B1
B0
02h (r/w)
PCL
Low order 8 bits of PC
TLC156 devices have a 9-bit (for TLC154/155) or 10-bit (for TLC156) or 11-bit (for TLC157)
wide Program Counter (PC) and five-level deep 9-bit (10-bit, or 11-bit) hardware push/pop stack. The low byte of PC
is called the PCL register. This register is readable and writable. The high byte of PC is called the PCH register. This
register contains the PC<10:8> bits and is not directly readable or writable. All updates to the PCH register go
through the PCHBUF register. As a program instruction is executed, the Program Counter will contain the address
of the next program instruction to be executed. The PC value is increased by one, every instruction cycle, unless an
instruction changes the PC.
For a GOTO instruction, the PC<9:0> is provided by the GOTO instruction word. The PC<10> is updated from the
PCHBUF<2>. The PCL register is mapped to PC<7:0>, and the PCHBUF register is not updated.
For a CALL instruction, the PC<9:0> is provided by the CALL instruction word. The PC<10> is updated from the
PCHBUF<2>. The next PC will be loaded (PUSHed) onto the top of STACK. The PCL register is mapped to
PC<7:0>, and the PCHBUF register is not updated.
For a RETIA, RETFIE, or RETURN instruction, the PC are updated (POPed) from the top of STACK. The PCL
register is mapped to PC<7:0>, and the PCHBUF register is not updated.
For any instruction where the PCL is the destination, the PC<7:0> is provided by the instruction word. However, the
PC<10:8> will come from the PCHBUF<2:0> register (PCHBUF
à PCH).
PCHBUF register is never updated with the contents of PCH.
bank select
TLC
TLC156
Rev0.95 Nov 20, 2003
P.2/TLC156


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