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COP87L88RGN-XE Datasheet(PDF) 10 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # COP87L88RGN-XE
Description  8-Bit One-Time Programmable (OTP) Microcontroller with 32 Kbytes of Program Memory
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

COP87L88RGN-XE Datasheet(HTML) 10 Page - National Semiconductor (TI)

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Control Registers (Continued)
PSW Register (Address X 00EF)
The PSW register contains the following select bits
GIE
Global interrupt enable (enables interrupts)
EXEN
Enable external interrupt
BUSY
MICROWIREPLUS busy shifting flag
EXPND
External interrupt pending
T1ENA
Timer T1 Interrupt Enable for Timer Underflow
or T1A Input capture edge
T1PNDA Timer T1 Interrupt Pending Flag (Autoreload RA
in mode 1 T1 Underflow in Mode 2 T1A cap-
ture edge in mode 3)
C
Carry Flag
HC
Half Carry Flag
HC
C T1PNDA T1ENA EXPND BUSY EXEN GIE
Bit 7
Bit 0
The Half-Carry bit is also affected by all the instructions that
affect the Carry flag The SC (Set Carry) and RC (Reset
Carry) instructions will respectively set or clear both the car-
ry flags In addition to the SC and RC instructions ADC
SUBC RRC and RLC instructions affect the carry and Half
Carry flags
ICNTRL Register (Address X 00E8)
The ICNTRL register contains the following bits
T1ENB
Timer T1 Interrupt Enable for T1B Input capture
edge
T1PNDB Timer T1 Interrupt Pending Flag for T1B cap-
ture edge
WEN
Enable MICROWIREPLUS interrupt
WPND
MICROWIREPLUS interrupt pending
T0EN
Timer T0 Interrupt Enable (Bit 12 toggle)
T0PND
Timer T0 Interrupt pending
LPEN
L Port Interrupt Enable (Multi-Input Wake Up
Interrupt)
Bit 7 could be used as a flag
Unused LPEN T0PND T0EN
WPND
WEN T1PNDB T1ENB
Bit 7
Bit 0
T2CNTRL Register (Address X 00C6)
The T2CNTRL register contains the following bits
T2ENB
Timer T2 Interrupt Enable for T2B Input capture
edge
T2PNDB Timer T2 Interrupt Pending Flag for T2B cap-
ture edge
T2ENA
Timer T2 Interrupt Enable for Timer Underflow
or T2A Input capture edge
T2PNDA Timer T2 Interrupt Pending Flag (Autoreload RA
in mode 1 T2 Underflow in mode 2 T2A cap-
ture edge in mode 3)
T2C0
Timer T2 StartStop control in timer modes 1
and 2 Timer T2 Underflow Interrupt Pending
Flag in timer mode 3
T2C1
Timer T2 mode control bit
T2C2
Timer T2 mode control bit
T2C3
Timer T2 mode control bit
T2C3 T2C2 T2C1 T2C0 T2PNDA T2ENA T2PNDB T2ENB
Bit 7
Bit 0
T3CNTRL Register (Address X 00B6)
The T3CNTRL register contains the following bits
T3ENB
Timer T3 Interrupt Enable for T3B
T3PNDB Timer T3 Interrupt Pending Flag for T3B pin
(T3B capture edge)
T3ENA
Timer T3 Interrupt Enable for Timer Underflow
or T3A pin
T3PNDA Timer T3 Interrupt Pending Flag (Autoload RA
in mode 1 T3 Underflow in mode 2 T3a cap-
ture edge in mode 3)
T3C0
Timer T3 StartStop control in timer modes 1
and 2
Timer T3 Underflow Interrupt Pending Flag in
timer mode 3
T3C1
Timer T3 mode control bit
T3C2
Timer T3 mode control bit
T3C3
Timer T3 mode control bit
T3C3
T3C2
T3C1
T3C0 T3PNDA T3ENA T3PNDB T3ENB
Bit 7
Bit 0
Timers
The device contains a very versatile set of timers (T0 T1
T2 T3) All timers and associated autoreloadcapture regis-
ters power up containing random data
TIMER T0 (IDLE TIMER)
The devices support applications that require maintaining
real time and low power with the IDLE mode This IDLE
mode support is furnished by the IDLE timer T0 which is a
16-bit timer The Timer T0 runs continuously at the fixed
rate of the instruction cycle clock tc The user cannot read
or write to the IDLE Timer T0 which is a count down timer
The Timer T0 supports the following functions
Exit out of the Idle Mode (See Idle Mode description)
WATCHDOG logic (See WATCHDOG description)
Start up delay out of the HALT mode
The IDLE Timer T0 can generate an interrupt when the thir-
teenth bit toggles This toggle is latched into the T0PND
pending flag and will occur every 4 ms at the maximum
clock frequency (tc e 1 ms) A control flag T0EN allows the
interrupt from the thirteenth bit of Timer T0 to be enabled or
disabled Setting T0EN will enable the interrupt while reset-
ting it will disable the interrupt
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