參數(shù)資料
型號(hào)： ST72774S9T1
廠商： 意法半導(dǎo)體
元件分類： ADC
英文描述： 8-BIT USB MCU FOR MONITORS, WITH UP TO 60K OTP, 1K RAM, ADC, TIMER, SYNC, TMU, PWM/BRM, H/W DDC & I2C
中文描述： 8位USB單片機(jī)的顯示器，高達(dá)60K章檢察官辦公室，每1000內(nèi)存，模數(shù)轉(zhuǎn)換器，定時(shí)器，同步，材質(zhì)單元，脈寬調(diào)制/的BRM，的H / W DDC的
文件頁數(shù)： 110/144頁
文件大?。?/td> 1280K
代理商： ST72774S9T1
ST72774/ST727754/ST72734
110/144
DDC INTERFACE
(Cont’d)
4.8.6 Register Description
DDC CONTROL REGISTER (CR)
Read / Write
Reset Value: 0000 0000 (00h)
Bit 7:6 = Reserved. Forced to 0 by hardware.
Bit 5 =
PE
Peripheral enable.
This bit is set and cleared by software.
0: Peripheral disabled
1: Slave capability
Notes:
– When PE=0, all the bits of the CR register and
the SR register are reset. All outputs are re-
leased while PE=0
– When PE=1, the corresponding I/O pins are se-
lected by hardware as alternate functions.
– To enable the I
2
C interface, write the CR register
TWICE
with PE=1 as the first write only activates
the interface (only PE is set).
Bit 4 =
EDDCEN
Enhanced DDC address
detection enabled.
This bit is set and cleared by software. It is also
cleared by hardware when the interface is disabled
(PE=0). The 60h/61h Enhanced DDC address is
acknowledged.
0: Enhanced DDC address detection disabled
1: Enhanced DDC address detection enabled
Bit 3 = Reserved. Forced to 0 by hardware.
Bit 2 =
ACK
Acknowledge enable.
This bit is set and cleared by software. It is also
cleared by hardware when the interface is disabled
(PE=0).
0: No acknowledge returned
1: Acknowledge returned after an address byte or
a data byte is received
Bit 1 =
STOP
Release I2C bus
.
This bit is set and cleared by software or when the
interface is disabled (PE=0).
– Slave Mode:
0: Nothing
1: Release the SCL and SDA lines after the cur-
rent byte transfer (BTF=1). The STOP bit has to
be cleared by software.
Bit 0 =
ITE
Interrupt enable.
This bit is set and cleared by software and cleared
by hardware when the interface is disabled
(PE=0).
0: Interrupts disabled
1: Interrupts enabled
Refer to
Figure 68
for the relationship between the
events and the interrupt.
SCL is held low when the BTF or ADSL is detect-
ed.
7
0
0
0
PE
EDDC
EN
0
ACK
STOP
ITE
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