Samsung YP-P10 User Manual download pdf (Page 373)

USB DEVICE S3C2440A RISC MICROPROCESSOR

13-18

DMA INTERFACE CONTROL REGISTER (EPN_DMA_CON)

Register Address R/W Description Reset Value

EP1_DMA_CON 0x52000200(L)

0x52000203(B)

R/W

(byte)

EP1 DMA interface control register 0x00

EP2_DMA_CON 0x52000218(L)

0x5200021B(B)

R/W

(byte)

EP2 DMA interface control register 0x00

EP3_DMA_CON 0x52000240(L)

0x52000243(B)

R/W

(byte)

EP3 DMA interface control register 0x00

EP4_DMA_CON 0x52000258(L)

0x5200025B(B)

R/W

(byte)

EP4 DMA interface control register 0x00

EPn_DMA_CON Bit MCU USB Description Initial State

RUN_OB [7] R/W W Read) DMA run observation

0: DMA is stopped 1:DMA is running

Write) Ignore EPn_DMA_TTC_n register

0: DMA requests will be stopped if

EPn_DMA_TTC_n reaches 0.

1: DMA requests will be continued although

EPn_DMA_TTC_n reaches 0.

0

STATE [6:4] R W DMA state monitoring 0

DEMAND_MODE [3] R/W R DMA demand mode enable bit

0: Demand mode disable

1: Demand mode enable

0

OUT_RUN_OB /

OUT_DMA_RUN

[2] R/W R/W Functionally separated into write and read

operation.

Write operation: ‘0’ = Stop ‘1’ = Run

Read operation: OUT DMA Run Observation

0

IN_DMA_RUN [1] R/W R Start DMA operation.

0 = Stop 1 = Run

0

DMA_MODE_EN [0] R/W R/Clear Set DMA mode.If the RUN_OB has been wrtten

as 0 and EPn_DMA_TTC_n reaches 0,

DMA_MODE_EN bit will be cleared by USB.

0 = Interrupt Mode

1 = DMA Mode

0

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