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CHAPTER 10 CLOCK OUTPUT/BUZZER OUTPUT CONTROLLER
Preliminary User’s Manual U16035EJ1V0UM
10.2 Configuration of Clock Output/Buzzer Output Controller
The clock output/buzzer output controller consists of the following hardware.
Table 10-1. Configuration of Clock Output/Buzzer Output Controller
Item
Configuration
Control registers
Clock output select register (CKS)
Port mode register (PM7)
Note
Note
See
Figure 4-12 Block Diagram of P74 and P75
.
10.3 Registers to Control Clock Output/Buzzer Output Controller
The following two types of registers are used to control the clock output/buzzer output controller.
• Clock output select register (CKS)
• Port mode register (PM7)
(1) Clock output select register (CKS)
This register sets output enable/disable for clock output (PCL) and for the buzzer frequency output (BUZ), and
sets the output clock.
CKS is set by a 1-bit or 8-bit memory manipulation instruction.
RESET input sets CKS to 00H.