NXP Semiconductors
UM10858
PN7462 family HW user manual
UM10858
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© NXP B.V. 2018. All rights reserved.
User manual
COMPANY PUBLIC
Rev. 1.4 — 14 May 2018
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128 of 345
•
The watchdog interrupt is connected to the ARM subsystem NMI (non-mask able
Interrupt).
•
The watchdog eventually sends a reset signal to the PCR to reset the chip if the
threshold setting is not periodically reloaded by the FW.
•
The watchdog reset is enabled by software, requires a system reset or a Watchdog
reset/interrupt to be disabled. When enabled, The CPU must pulse the kick bit to
reload the watchdog counter before it expires.
11.4 Register overview and description
11.4.1 Register overview
Table 149. Timer register overview (base address 0x4001 C000)
Name
Address
offset
Width
(bits)
Access Reset value
Description
TIMERS_TIMER0_CONTROL_REG
0000h
32
R/W
0000000h
Control of Timer 0
TIMERS_TIMER0_TIMEOUT_REG
0004h
32
R/W
0000000h
Timeout value of Timer0
TIMERS_TIMER0_COUNT_REG
0008h
32
R
0000000h
Current count value of
Timer0
TIMERS_TIMER1_CONTROL_REG
000Ch
32
R/W
0000000h
Control of Timer1
TIMERS_TIMER1_TIMEOUT_REG
0010h
32
R/W
0000000h
Timeout value of Timer1
TIMERS_TIMER1_COUNT_REG
0014h
32
R
0000000h
Current count value of
Timer1
TIMERS_TIMER2_CONTROL_REG
0018h
32
R/W
0000000h
Control of Timer 2
TIMERS_TIMER2_TIMEOUT_REG
001Ch
32
R/W
0000000h
Timeout value of Timer2
TIMERS_TIMER2_COUNT_REG
0020h
32
R
0000000h
Current count value of
Timer2
TIMERS_TIMER3_CONTROL_REG
0024h
32
R/W
0000000h
Control of Timer3
TIMERS_TIMER3_TIMEOUT_REG
0028h
32
R/W
0000000h
Timeout value of Timer3
TIMERS_TIMER3_COUNT_REG
002Ch
32
R
0000000h
Current count value of
Timer3
TIMERS_WDOG_CONTROL_REG
0030h
32
R/W
0000000h
Control of Watchdog Timer
TIMERS_WDOG_TIMEOUT_REG
0034h
32
R/W
0000000h
Timeout value of Watchdog
Timer
TIMERS_WDOG_TRIGGER_INT_REG
0038h
32
R/W
0000000h
Count value of Watchdog
Timer which triggers
interrupt
TIMERS_WDOG_COUNT_REG
003Ch
32
R
0000000h
Current count value of
Watchdog Timer
RESERVED
0040h
32
R/W
00000000h
Reserved
RESERVED
0044h
32
R
00000000h
Reserved
RESERVED
0048h -
3FC8h
32
R
00000000h
Reserved
TIMERS_WDOG_INT_STATUS_REG
3FCCh
32
R
00000000h
Watchdog interrupt status
TIMERS_WDOG_INT_CLR_STATUS_REG
3FD0h
32
W
00000000h
Watchdog clear interrupt
