ST92124JDR9TC View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST92124JDR9TC

8/16-BIT SINGLE VOLTAGE FLASH MCU FAMILY WITH RAM, E³ ™ (EMULATED EEPROM), CAN 2.0B AND J1850 BLPD

STMicroelectronics 

J1850 Byte Level Protocol Decoder (JBLPD)

J1850 BYTE LEVEL PROTOCOL DECODER (Cont’d)

10.9.7.2 Stacked Registers

See the description of the OPTIONS register to

obtain more information on the map of the regis-

ters of this section.

JBLPD RECEIVER DMA ADDRESS POINTER

REGISTER (RDAPR)

R252 - RSEL[3:0]=0000b

Register Page: 23

Reset Value: xxxx xxxx (xxh)

7

0

RA7 RA6 RA5 RA4 RA3 RA2 RA1 PS

To select this register, the RSEL[3:0] bits of the

OPTIONS register must be reset

Register File) of the DMA receiver transaction

counter when the DMA between Peripheral and

Memory Space is selected. Otherwise, if the DMA

between Peripheral and Register File is selected,

this register points to a pair of registers that are

used as DMA Address register and DMA Transac-

tion Counter.

See Section 10.9.6.1and Section 10.9.6.2 for

more details on the use of this register.

Bit 0 = RF/MEM Receiver Register File/Memory

Selector.

If this bit is set to “1”, then the Register File will be

selected as Destination, otherwise the Memory

space will be used.

0: Receiver DMA with Memory space

1: Receiver DMA with Register File

Bit 7:1 = RA[7:1] Receiver DMA Address Pointer.

RDAPR contains the address of the pointer (in the

Register File) of the Receiver DMA data source

when the DMA between the peripheral and the

Memory Space is selected. Otherwise, when the

DMA between the peripheral and Register File is

selected, this register has no meaning.

See Section 10.9.6.2 for more details on the use of

this register.

JBLPD TRANSMITTER DMA ADDRESS POINT-

ER REGISTER (TDAPR)

R254 - RSEL[3:0]=0000b

Register Page: 23

Reset Value: xxxx xxxx (xxh)

7

0

TA7 TA6 TA5 TA4 TA3 TA2 TA1 PS

Bit 0 = PS Memory Segment Pointer Selector.

This bit is set and cleared by software. It is only

meaningful if RDCPR.RF/MEM = 1.

0: The ISR register is used to extend the address

of data received by DMA (see MMU chapter)

1: The DMASR register is used to extend the ad-

dress of data received by DMA (see MMU chap-

ter)

JBLPD RECEIVER DMA TRANSACTION

COUNTER REGISTER (RDCPR)

R253 - RSEL[3:0]=0000b

Register Page: 23

Reset Value: xxxx xxxx (xxh)

7

0

RC7 RC6 RC5 RC4 RC3 RC2 RC1 RF/MEM

To select this register, the RSEL[3:0] bits of the

OPTIONS register must be reset

Bit 7:1 = RC[7:1] Receiver DMA Counter Pointer.

RDCPR contains the address of the pointer (in the

To select this register, the RSEL[3:0] bits of the

OPTIONS register must be reset

Bit 7:1 = TA[7:1] Transmitter DMA Address Point-

er.

TDAPR contains the address of the pointer (in the

Register File) of the Transmitter DMA data source

when the DMA between the Memory Space and

the peripheral is selected. Otherwise, when the

DMA between Register File and the peripheral is

selected, this register has no meaning.

See Section 10.9.6.2 for more details on the use of

this register.

Bit 0 = PS Memory Segment Pointer Selector.

This bit is set and cleared by software. It is only

meaningful if TDCPR.RF/MEM = 1.

0: The ISR register is used to extend the address

of data transmitted by DMA (see MMU chapter)

1: The DMASR register is used to extend the ad-

dress of data transmitted by DMA (see MMU

chapter)

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