W7500x Reference Manual Version1.1.0
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PCLK is the main APB system clock and is used by the register interface.
Interrupt and reset request
An interrupt is generated when the counter reaches 0 and is only cleared when the
interrupt clear register is accessed.
The register holds the value until the interrupt is cleared.
Reset request is asserted when the counter reaches 0 repeatedly and is not
reprogrammed.
Users can mask interrupts by writing 0 to the Interrupt Enable bit in the control register.
Users can read the following from status registers:
-
Raw interrupt status, before masking.
-
Final interrupt status, after masking.
Figure 41 Watchdog timer operation flow diagram
23.4
Watchdog timer Registers (Base address : 0x4000_0000)
Watchdog timer Load Register(WDTLoad)
Address offset : 0x000
Reset value : 0xFFFF_FFFF
31
0
WLR
R/W
[31:0] WLR – Watchdog timer Load Register.
This register contains the value from which the counter is to decrement.
When this register is written to, the count is immediately restarted from the
new value. The minimum valid value for WDTLoad is 1.
Watchdog timer is
programmed
Counter reaches zero
Counter reaches zero
Count down
without reprogram
Counter reloaded
and count down
without reprotram
If the interrupt enable bit in the
WDTControl register is set to 1,
interrupt is asserted.
If the reset enable bit in the
WDTControl register is set to 1, reset
request signal is asserted.
Содержание W7500
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Страница 391: ...W7500x Reference Manual Version1 1 0 391 399 1 SSP1 must not drive the SSPTXD output in slave mode ...