ST92F120V1Q7 STMicroelectronics, ST92F120V1Q7 Datasheet - Page 236
ST92F120V1Q7
Manufacturer Part Number
ST92F120V1Q7
Description
Microcontrollers (MCU) Flash 128K SPI/I2C
Manufacturer
STMicroelectronics
Datasheet
1.ST92F120V9Q7.pdf
(325 pages)
Specifications of ST92F120V1Q7
Data Bus Width
8 bit, 16 bit
Program Memory Type
Flash
Program Memory Size
128 KB
Data Ram Size
4 KB
Interface Type
I2C, SPI
Maximum Clock Frequency
24 MHz
Number Of Programmable I/os
77
Number Of Timers
5
Maximum Operating Temperature
+ 105 C
Mounting Style
SMD/SMT
Package / Case
PQFP-100
Minimum Operating Temperature
- 40 C
On-chip Adc
8 bit, 16 Channel
Lead Free Status / Rohs Status
No
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I2C BUS INTERFACE
I
INTERRUPT MASK REGISTER (I2CIMR)
R255 - Read / Write
Register Page: 20
Reset Value: 00xx 0000 (x0h)
Bit 7 = RXDM Receiver DMA Mask .
0: DMA reception disable.
1: DMA reception enable
RXDM is reset by hardware when the transaction
counter value decrements to zero, that is when a
Receiver End Of Block interrupt is issued.
Bit 6 = TXDM Transmitter DMA Mask .
0: DMA transmission disable.
1: DMA transmission enable.
TXDM is reset by hardware when the transaction
counter value decrements to zero, that is when a
Transmitter End Of Block interrupt is issued.
Bit 5 = REOBP Receiver DMA End Of Block Flag .
REOBP should be reset by software in order to
avoid undesired interrupt routines, especially in in-
itialization routine (after reset) and after entering
the End Of Block interrupt routine.Writing “0” in
this bit will cancel the interrupt request
Note: REOBP can only be written to “0”.
0: End of block not reached.
1: End of data block in DMA receiver detected
Bit 4 = TEOBP Transmitter DMA End Of Block TE-
OBP should be reset by software in order to avoid
undesired interrupt routines, especially in initializa-
tion routine (after reset) and after entering the End
Of Block interrupt routine.Writing “0” will cancel the
236/324
9
2
RXD
C BUS INTERFACE (Cont’d)
M
7
TXD
M
REOBP TEOBP
0
IERR
M
IRX
M
ITX
M
0
interrupt request.
Note: TEOBP can only be written to “0”.
0: End of block not reached
1: End of data block in DMA transmitter detected.
Bit 3 = Reserved. This bit must be cleared.
Bit 2 = IERRM Error Condition interrupt mask bit.
This bit enables/ disables the Error interrupt.
0: Error interrupt disabled.
1: Error Interrupt enabled.
Bit 1 = IRXM Data Received interrupt mask bit.
This bit enables/ disables the Data Received and
Receive DMA End of Block interrupts.
0: Interrupts disabled
1: Interrupts enabled
Note: This bit has no effect on DMA transfer
Bit 0 = ITXM Peripheral Ready To Transmit inter-
rupt mask bit.
This bit enables/ disables the Peripheral Ready To
Transmit and Transmit DMA End of Block inter-
rupts.
0: Interrupts disabled
1: Interrupts enabled
Note: This bit has no effect on DMA transfer.
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