Samsung S3C6400X User Manual page 775

MODEM INTERFACE
Software Interface and Registers
This modem interface provides a generic data-exchange method. This interface does not implement any other
complex features except for the interrupt-request/clear such as automatic FIFO managements, etc. The software
should be responsible for all other required functionalities for the data exchange between the modem chip and
the AP such as the data exchange protocol, the data buffer managements, and etc.
MSM Interface Special Function Registers
Interrupt Request to AP Register (INT2AP)
Register address
INT2AP 0x74108000
INT2AP
[31:13] Reserved
Reserved
INT2AP_ADR [12:0]
Interrupt Request to Modem Register (INT2MSM)
Register Address
INT2MSM 0x74108004
INT2MSM
[31:13] Reserved
Reserved
INT2MSM_ADR [12:0]
Note ) It is recommended that AP writes data with half-word access on the interrupt port because AP can
overwrite the data in INT2AP if there are INT2AP and INT2MSM sharing the same word.
23-10
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
R/W
R/W
Bit
Modem interface requests the interrupt to AP when modem chip
writes this address. This interrupt is cleared by the interrupt
controller of AP and write access to the MSMINTCLR register.
R/W
R/W
Bit
Modem interface (in this module) requests the interrupt to modem
chip when AP writes this address and clears the interrupt when
modem chip write 1 to the corresponding bit field.
Description
Interrupt request to AP register
Description
Description
Interrupt request to MSM modem register
Description
S3C6400X
RISC MICROPROCESSOR
Reset Value
0x00001FFE
Reset Value
0x00001FFC
Initial State
0
1FFE
Initial State
0
1FFC