NXP Semiconductors UM11227 - Ext. Interrupt Status and Control Register (IRQSC)

NXP Semiconductors
UM11227
NTM88 family of tire pressure monitor sensors
UM11227 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2020. All rights reserved.
User manual Rev. 6 — 24 April 2020
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Table 41. KBIES register field descriptions
Field Description
3:0
KBED
GE[3:0]
KBEDGE[3:0] – The 4 bits KBEDGE[3:0] selects the edge/low level or rising edge/high level function of the
corresponding pin.
0 = Falling edge/low level, available in all modes; Result of Reset
1 = Rising edge/high level, only available while in Run mode.
10.12.2.4 Ext. interrupt status and control register (IRQSC)
Note: Prior to enable of the IRQ by setting to 1 the IRQIE, this status byte must be read
as a first step to avoid an immediate assertion of the interrupt. Also, the Interrupt IRQF
will immediately result:
•
if the port pin PTA0 is at a logic 1 state and
•
the user subsequently enables the Interrupt by setting to 1 the IRQPE and
the user sets the edge to rising/high by setting to 1 the IRQEDG
aaa-031054
SYNCHRONIZER
SYNCHRONIZER
IPG_CLK
STOP BYPASS
STOP
IRQEDG
IRQACK
IRQPE
RESET
V
DD
D Q
1
0
S
IRQ
IRQMODIRQPDD
to pullup/pulldown
enable logic for IRQ
IRQF
IRQIE
IRQ
interrupt
request
to CPU for
BIL/BIH
instructions
CK
CLR
Figure 16. External interrupt logic
Table 42. Ext. interrupt status and control register (IRQSC) (address $000F)
Bit 7 6 5 4 3 2 1 0
R 0 IRQF 0
W —
IRQPDD IRQEDG IRQPE
— IRQACK
IRQIE IRQMOD
Reset 0 0 0 0 U 0 0 0
POR ($00) 0 0 0 0 0 0 0 0
Table 43. IRQSC register field descriptions
Field Description
6
IRQPDD
IRQPDD — IRQ Pull Device Disable Bit
The IRQPDD bit is used to disable the on-chip pullup/pulldown device on the IRQ pin. This allows users to
have an external device if required for their application.
0 = On-chip pullup/pulldown device is enabled; Result of Reset
1 = On-chip pullup/pulldown device is disabled