Datasheet

FS98O22
Rev. 1.6 80/146
Table 7-4 PT2 register table
Address Name
Detail on
Chapter
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on Power on
Reset
24H PT2 7 PT2 [7:0] uuuuuuuu
25H PT2EN 7 PT2EN [7:0] 00000000
26H PT2PU 7 PT2PU [7:0] 00000000
27H PT2MR 7.2/7.5/8 -- PM2EN PM1EN -- -- 00000000
Read data Operation
1. Clear the PT2EN[n]
15
register flags. The PT2[n] will be defined as an input port.
2. Set the PT2PU[n] register as required. The PT2[n] will be connected to an internal pull up resistor.
3. After the signal input from outside, user could get the data through PT2[n]
Write data Operation
1. Set the PT2EN[n] register flags. The PT2[n] will be defined as an output port.
2. Set the PT2PU[n] register as required. The PT2[n] will be connected to an internal pull up resistor.
3. Set the PT2[n] to output the data. The embedded D Flip Flop will latch the data till user change PT2[n].
Notice Operation
1. Parallel a small resistor (about 10k ohm) between ports and VDD to increase the possible output current
when the PT2PU[n] is set.
7.4. Digital I/O Port or I2C Serial Port : PT2[3]/SDA, PT2[4]/SCL
Figure 7-4 PT2[3] PT2[4] function block
GPIO Port 2 Bit4 and Bit 3 (PT2[4:3]) function block is shown in Figure 7-4. The main function of the GPIO is
input and output data between the Data bus and the ports. Users could control the PT2EN[4:3] register flags to
decide the input output direction. The input and output function and the related functions are explained as
follows:
15
n means the bits indexes user want to control
FORTUNE'
Properties
For Reference Only