RM0352 datasheet(62/138 Pages) STMICROELECTRONICS

62 / 138 page

ARM© dual timer module (SP804)

RM0352

62/138

DocID024647 Rev 1

Raw interrupt status register, TimerXRIS

The TimerXRIS register indicates the raw interrupt status from the counter. The bit

assignment is listed in

Table 54.

Masked interrupt status register, TimerXMIS

The TimerXMIS register indicates the masked interrupt status from the counter. This value is

the logical AND of the raw interrupt status with the Timer Interrupt Enable bit from the

control register, and is the same value which is passed to the interrupt output pin, TIMINTX.

The bit assignment is listed in

Table 55.

Background load register, TimerXBGLoad

The TimerXBGLoad register is a 32-bit register that contains the value from which the

counter is to decrement. This is the value used to reload the counter when Periodic mode is

enabled, and the current count reaches zero.

This provides an alternative method of accessing the TimerXLoad register. The difference is

that writes to TimerXBGLoad do not cause the counter to restart from the new value

immediately.

Reading from this register returns the same value returned from TimerXLoad. See

Section :

Load register, TimerXLoad on page 60 for more information.

Peripheral identification registers, TimerPeriphID0-3

The TimerPeriphID0-3 registers are four 8-bit registers, that span address location 0xFE0 -

0xFEC. The registers can conceptually be treated as a 32-bit register. The read-only

registers provide the peripheral options listed in

Table 56.

Table 54. Raw interrupt status register bit assignments

Bits

Name

Type

Function

[31:1]

RESERVED bits, do not modify, and ignore on read

[0]

TimerXRIS

Read

Raw interrupt status from the counter

Table 55. Masked interrupt status register bit assignments

Bits

Name

Type

Function

[31:1]

RESERVED bits, do not modify, and ignore on read

[0]

TimerXMIS

Read

Enabled interrupt status from the counter

Table 56. Peripheral identification register options

Bits

Function

PartNumber[11:0]

This is used to identify the peripheral. The three digits product code 0x804 is used.

Designer ID[19:12]

This is the identification of the designer. ARM Limited is 0x41 (ASCII A).

Revision[23:20]

This is the revision number of the peripheral. The revision number starts from 0.

Configuration[31:24]

This is the configuration option of the peripheral. The configuration value is 0.

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