cp3cn17 National Semiconductor Corporation, cp3cn17 Datasheet - Page 162
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cp3cn17
Manufacturer Part Number
cp3cn17
Description
Reprogrammable Connectivity Processor With Can Interface
Manufacturer
National Semiconductor Corporation
Datasheet
1.CP3CN17.pdf
(220 pages)
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TAPND
TBPND
TCPND
TDPND
TAIEN
TBIEN
TCIEN
The Timer Interrupt Source A Pending bit indi-
cates that timer interrupt condition A has oc-
curred. For an explanation of interrupt
conditions A, B, C, and D, see Table 63. This
bit can be set by hardware or by software. To
clear this bit, software must use the Timer In-
terrupt Clear Register (TICLR). Any attempt
by software to directly write a 0 to this bit is ig-
nored.
0 – Interrupt source A has not triggered.
1 – Interrupt source A has triggered.
The Timer Interrupt Source B Pending bit indi-
cates that timer interrupt condition B has oc-
curred. For an explanation of interrupt
conditions A, B, C, and D, see Table 63. This
bit can be set by hardware or by software. To
clear this bit, software must use the Timer In-
terrupt Clear Register (TICLR). Any attempt
by software to directly write a 0 to this bit is ig-
nored.
0 – Interrupt source B has not triggered.
1 – Interrupt source B has triggered.
The Timer Interrupt Source C Pending bit in-
dicates that timer interrupt condition C has oc-
curred. For an explanation of interrupt
conditions A, B, C, and D, see Table 63. This
bit can be set by hardware or by software. To
clear this bit, software must use the Timer In-
terrupt Clear Register (TICLR). Any attempt
by software to directly write a 0 to this bit is ig-
nored.
0 – Interrupt source C has not triggered.
1 – Interrupt source C has triggered.
The Timer Interrupt Source D Pending bit in-
dicates that timer interrupt condition D has oc-
curred. For an explanation of interrupt
conditions A, B, C, and D, see Table 63. This
bit can be set by hardware or by software. To
clear this bit, software must use the Timer In-
terrupt Clear Register (TICLR). Any attempt
by software to directly write a 0 to this bit is ig-
nored.
0 – Interrupt source D has not triggered.
1 – Interrupt source D has triggered.
The Timer Interrupt A Enable bit controls
whether an interrupt is generated on each oc-
currence of interrupt condition A. For an ex-
planation of interrupt conditions A, B, C, and
D, see Table 63.
0 – Condition A interrupts disabled.
1 – Condition A interrupts enabled.
The Timer Interrupt B Enable bit controls
whether an interrupt is generated on each oc-
currence of interrupt condition B. For an ex-
planation of interrupt conditions A, B, C, and
D, see Table 63.
0 – Condition B interrupts disabled.
1 – Condition B interrupts enabled.
The Timer Interrupt C Enable bit controls
whether an interrupt is generated on each oc-
currence of interrupt condition C. For an ex-
162
TDIEN
22.5.9
The TICLR register is a byte-wide, write-only register that al-
lows software to clear the TAPND, TBPND, TCPND, and
TDPND bits in the Timer Interrupt Control (TICTRL) regis-
ter. Do not modify this register with instructions that access
the register as a read-modify-write operand, such as the bit
manipulation instructions. The register reads as FFh. The
register format is shown below.
TACLR
TBCLR
TCCLR
TDCLR
7
Reserved
Timer Interrupt Clear Register (TICLR)
planation of interrupt conditions A, B, C, and
D, see Table 63.
0 – Condition C interrupts disabled.
1 – Condition C interrupts enabled.
The Timer Interrupt D Enable bit controls
whether an interrupt is generated on each oc-
currence of interrupt condition D. For an ex-
planation of interrupt conditions A, B, C, and
D, see Table 63.
0 – Condition D interrupts disabled.
1 – Condition D interrupts enabled.
The Timer Pending A Clear bit is used to clear
the Timer Interrupt Source A Pending bit
(TAPND) in the Timer Interrupt Control regis-
ter (TICTL).
0 – Writing a 0 has no effect.
1 – Writing a 1 clears the TAPND bit.
The Timer Pending A Clear bit is used to clear
the Timer Interrupt Source B Pending bit (TB-
PND) in the Timer Interrupt Control register
(TICTL).
0 – Writing a 0 has no effect.
1 – Writing a 1 clears the TBPND bit.
The Timer Pending C Clear bit is used to clear
the Timer Interrupt Source C Pending bit
(TCPND) in the Timer Interrupt Control regis-
ter (TICTL).
0 – Writing a 0 has no effect.
1 – Writing a 1 clears the TCPND bit.
The Timer Pending D Clear bit is used to clear
the Timer Interrupt Source D Pending bit (TD-
PND) in the Timer Interrupt Control register
(TICTL).
0 – Writing a 0 has no effect.
1 – Writing a 1 clears the TDPND bit.
4
TDCLR TCCLR TBCLR TACLR
3
2
1
0
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