CHAPTER 12 REAL-TIME OUTPUT FUNCTION (RTO)
User’s Manual U16896EJ2V0UD
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(1) PLL control register (PLLCTL)
The PLLCTL register is an 8-bit register that controls the RTO security function and PLL.
This register can be read or written in 8-bit or 1-bit units.
Reset sets this register to 01H.
0
PLLCTL
0
0
0
0
RTOST0 SELPLL
Note
PLLON
Note
INTP0 pin is not used as trigger for security function
INTP0 pin is used as trigger for security function
RTOST0
0
1
Control of RTP00 to RTP05 security function
After reset: 01H R/W Address: FFFFF806H
< >
< >
< >
Note
For details on the SELPLL and PLLON bits, refer to
CHAPTER 5 CLOCK GENERATION
FUNCTION
.
Cautions 1. Before outputting a value to the real-time output ports (RTP00 to RTP05),
select the INTP0 pin interrupt edge detection and then set the RTOST0 bit.
2. To set again the ports (P50 to P55 pins) as real-time output ports after
placing them in high impedance via the INTP0 pin, first cancel the security
function.
[Procedure to set ports again]
<1> Cancel the security function and enable port setting by clearing the
RTOST0 bit to 0.
<2> Set the RTOST0 bit to 1 (only if required).
<3> Set again as real-time output port.
3. Be sure to clear bits 4 to 7 to “0”. Changing bit 3 does not affect the
operation.
Содержание ?PD703302
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