參數(shù)資料
型號: PIC12C67X
廠商: Microchip Technology Inc.
英文描述: 8-Pin, 8-Bit CMOS Microcontroller with A/D Converter and EEPROM Data Memory
中文描述: 8引腳,8位CMOS微控制器與A / D轉(zhuǎn)換器和EEPROM數(shù)據(jù)存儲器
文件頁數(shù): 34/129頁
文件大小: 931K
代理商: PIC12C67X
PIC12C67X
DS30561B-page 34
1999 Microchip Technology Inc.
6.1.5
ACKNOWLEDGE
The EEPROM, when addressed, will generate an
acknowledge after the reception of each byte. The pro-
cessor must generate an extra clock pulse which is
associated with this acknowledge bit.
The device that acknowledges has to pull down the
SDA line during the acknowledge clock pulse in such a
way that the SDA line is stable LOW during the HIGH
period of the acknowledge related clock pulse. Of
course, setup and hold times must be taken into
account. The processor must signal an end of data to
the EEPROM by not generating an acknowledge bit on
the last byte that has been clocked out of the EEPROM.
In this case, the EEPROM must leave the data line
HIGH to enable the processor to generate the STOP
condition (Figure 6-4).
FIGURE 6-1:
BLOCK DIAGRAM OF GPIO6 (SDA LINE)
FIGURE 6-2:
BLOCK DIAGRAM OF GPIO7 (SCL LINE)
Note:
Acknowledge bits are not generated if an
internal programming cycle is in progress.
EN
D
EN
Q
D
Reset
CK
Q
Data Bus
Write
GPIO
Output Latch
To EEPROM SDA
Pad
Schmitt Trigger
ltchpin
Input Latch
Read
GPIO
V
DD
P
EN
D
EN
Q
D
CK
Q
Data Bus
Write
GPIO
To EEPROM SCL
Pad
ltchpin
Read
GPIO
V
DD
Schmitt Trigger
P
N
Output Latch
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