參數(shù)資料
型號: uPSD3412C-24U6T
廠商: 意法半導(dǎo)體
英文描述: Flash Programmable System Devices with 8032 Microcontroller Core and 16Kbit SRAM
中文描述: 閃存可編程系統(tǒng)設(shè)備與8032微控制器核心和16Kbit SRAM的
文件頁數(shù): 75/152頁
文件大?。?/td> 796K
代理商: UPSD3412C-24U6T
75/152
UPSD3212C, UPSD3212CV
I
2
C INTERFACE
The serial port supports the twin line I
2
C-bus, con-
sisting of a data line (SDA1), and a clock line
(SCL1) as shown in Figure 39. Depending on the
configuration, the SDA1 and SCL1 lines may re-
quire pull-up resistors.
These lines also function as I/O port lines if the I
2
C
bus is not enabled.
The system is unique because data transport,
clock generation, address recognition, and bus
control arbitration are all controlled by hardware.
The I
2
C serial I/O has complete autonomy in byte
handling and operates in 4 modes.
I
Master transmitter
I
Master receiver
I
Slave transmitter
I
Slave receiver
These functions are controlled by the SFRs (see
Tables 50, 51, and Table 52, page 76):
– S2CON: the control of byte handling and the op-
eration of 4 mode.
– S2STA: the contents of its register may also be
used as a vector to various service routines.
– S2DAT: data shift register.
– S2ADR: slave address register. Slave address
recognition is performed by On-Chip H/W.
Figure 39. Block Diagram of the I
2
C Bus Serial I/O
AI07430
SCL1
SDA1
Bus Clock Generator
Arbitration and Sync. Logic
Shift Register
Status Register
7
0
Slave Address
7
0
Control Register
7
0
7
0
I
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