Analog Devices ADSP-BF535 Blackfin, Hardware Reference Manual

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General-Purpose Timer Registers
16-2 ADSP-BF535 Blackfin Processor Hardware Reference
General-Purpose Timer Registers
Each general-purpose timer uses these 16-bit registers:
• Timer Status (
TIMERx_STATUS
)
• Timer Configuration (
TIMERx_CONFIG
)
• Timer Counter (
TIMERx_COUNTER_LO/HI
)
• Timer Period (
TIMERx_PERIOD_LO/HI
)
• Timer Width (
TIMERx_WIDTH_LO/HI
)
Timer registers are found in the memory range 0xFFC0 2000–
0xFFC0 23FF and are shown in
Table 16-1 .

For the sake of readability, this chapter follows the notation speci-
fied in
Table 16-2 , which removes the LO/HI identifier from the
TIMERx_COUNTER
,
TIMERx_PERIOD
, and
TIMERx_WIDTH
registers, refer-
ring to each of these MMRs as a 32-bit entity. Table 16-1 shows
the true register mappings that should be used in user code, as all
timer registers are 16 bits wide.

Always access 16-bit timer registers using 16-bit word read or write
commands.
Table 16-1. Timer Registers
Register Name Memory-Mapped Address Description
TIMER0_STATUS 0xFFC0 2000 Timer0 Status register
TIMER0_CONFIG 0xFFC0 2002 Timer0 Configuration register
TIMER0_COUNTER_LO 0xFFC0 2004 Timer0 Counter register, Low Word
TIMER0_COUNTER_HI 0xFFC0 2006 Timer0 Counter register, High Word
TIMER0_PERIOD_LO 0xFFC0 2008 Timer0 Period register, Low Word
TIMER0_PERIOD_HI 0xFFC0 200A Timer0 Period register, High Word