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7220 Datasheet(PDF) 86 Page - Renesas Technology Corp

Part # 7220
Description  8-BIT SINGLE-CHIP MICROCOMPUTER
PDF  303 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7220 Datasheet(HTML) 86 Page - Renesas Technology Corp

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7220 Group User’s Manual
2.8 Multi-master I2C-BUS interface
(3)
START/STOP condition detect conditions
The START/STOP condition detect conditions are shown in Figure 2.8.11 and Table 2.8.3. Only when
the 3 conditions of Table 10 are satisfied, a START/STOP condition can be detected.
Note: When a STOP condition is detected in the slave mode (MST = 0), an interrupt request signal
“IICIRQ” is generated to the CPU.
Hold time
Setup
time
SCL
SDA
(START condition)
SDA
(STOP condition)
SCL release time
Hold time
Setup
time
Fig. 2.8.11 START condition/STOP condition detect timing diagram
Table 2.8.3
START condition/STOP condition detect conditions
Standard clock mode
6.5
µ s (26 cycles) < SCL release time
3.25
µ s (13 cycles) < Setup time
3.25
µ s (13 cycles) < Hold time
High-speed clock mode
1.0
µ s (4 cycles) < SCL release time
0.5
µ s (2 cycles) < Setup time
0.5
µ s (2 cycles) < Hold time
Note: Absolute time at
f = 4 MHz. The value in parentheses denotes the number of f cycles.
FUNCTIONAL DESCRIPTION



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