SH7760 Datasheet, PDF (1298/1345 Pages) Renesas Technology Corp – SuperHTM RISC engine

33.3.12 I²C Electrical Characteristics
1. I²C block diagram and truth table
Figure 33.62 shows a block diagram of I²C I/O buffer and Table 33.16 shows a truth table.
scl_out/sda_out
scl_in/sda_in
I2Cn_SCL/I2Cn_SDA
(*)
Note : * schmit input
Figure 33.62 Block Diagram of I²C I/O Buffer
Table 33.16 Truth Table of I²C I/O Buffer
scl_out/sda_out
I2Cn_SCL/ I2Cn_SDA
scl_in/sda_in
1
Z
H/L level of I2Cn_SCL/ I2Cn_SDA
0
0
H/L level of I2Cn_SCL/ I2Cn_SDA
Notes: 1. The Output voltages from I2Cn_SCL/ I2Cn_SDA are undefined until the internal logic
will be stable after power on.
2. If a external pull down resistance is connected to a 5V tolerant buffer, the value of the
resistance must be less than 15kΩ.
2. I²C DC characteristics
Table 33.17 I²C DC Characteristics
Item
symbol
Input Voltage V_IH
V_IL
Output Voltage V_OL
Input Current I
i
Min.
V_DDQ ×0.8
−0.5
0
−10
Max.
5.5
V_DDQ ×0.1
0.4
10
Unit
V
V
V
µA
Test Condition
I_OL =3 mA
Input Voltage = 0.1×V_DDQ to 0.9×V_DDQ (max.)
Rev. 1.0, 02/03, page 1248 of 1294