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32186 Datasheet(PDF) 232 Page - Renesas Technology Corp

Part # 32186
Description  MCU
PDF  1032 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

32186 Datasheet(HTML) 232 Page - Renesas Technology Corp

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8
INPUT/OUTPUT PORTS AND PIN FUNCTIONS
8-30
32185/32186 Group Hardware Manual
Rev.1.10 REJ09B0235-0110 May 15, 07
8.3 Input/Output Port Related Registers
Read XSTAT bit
(1) To know whether XIN oscillation has ever stopped after being reset
Write XSTAT bit = 0
(2) To know the current status of XIN oscillation
Wait for 20 CPU
clock periods or more
Read XSTAT bit
Wait before inspecting XSTAT bit
Note:
• Pay attention about processing when XSTAT bit is set to "1," make double check after clearing XSTAT bit etc.
Figure 8.3.1 Procedure for Setting XSTAT bit
(2) PISEL (Port input data select) bit (Bit 14)
When the Port Direction Register is set for output, this bit selects the target data to be read from the Port
Data Register. At this time, this bit is unaffected by the Port Operation Mode Register.
Table 8.3.1 PISEL Bit Settings and the Target Data To Be Read from the Port Data Register
Direction Register
PISEL Settings
Target Data to Be Read
0 (input)
0/1
Port pin level
1 (output)
0
Port output latch
1
Port pin level



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