CMS32L051 User Manual |Chapter 9 Clock output/Buzzer Output Controller
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Chapter 9 Clock output/Buzzer Output Controller
Note: The following sections in this chapter are mainly for 48-pin products.
9.1 Functions of clock output/buzzer output controller
The clock output is the function of the output to the clock of the peripheral IC, and the buzzer output is the
function of the square wave of the output buzzer frequency.
This product has two clock output/buzzer output pins, where CLKBUZ0 can select any pin other than
RESETB as a clock output or buzzer output, and CLKBUZ1 can be used with P15 as a clock output or buzzer
output.
The CLKBUZn pin outputs the clock selected by clock output select register n (CKSn).
A block diagram of the clock output/buzzer output control circuit is shown in Figure 9-1.
Note: The subsystem clock (f
SUB
) cannot be output from the CLKBUZn pin when the RTCLPC bit of the subsystem clock
supply mode control register (OSMC) is 1 and in the SLEEP mode where the CPU is running with the subsystem clock (f
SUB
).
Note: n=0, 1
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