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Line 1:
Line 1: − == Registers ==+ − + − + − + − + + − + + − | 0x1EC61000 + − + + − | 0x1EC61001 + − + + − | 0x1EC61002 + − + + − | 0x1EC61004 + − + + − | 0x1EC44000 + − + + − | 0x1EC44001 + − + + − | 0x1EC44002 + − + + − | 0x1EC44004 + − + + − | 0x1EC48000 + − + + − | 0x1EC48001 + − + + − | 0x1EC48002 + − + + − | 0x1EC48004 + + + + + + + + + + + + + + + + + + + + + + + + + + + + − == I2C Devices ==+ Line 407:
Line 447: − − = I2CCNT = − {| class="wikitable" border="1" − |+ REG_I2CxCNT − ! BIT − ! DESCRIPTION − |- − | 0 − | HOLD (0=Last byte of transaction, 1=More bytes coming) − |- − | 2 − | Error flag/ack? − |- − | 4 − | Read mode related? − |- − | 5 − | Read mode? − |- − | 6 − | IRQ enable? − |- − | 7 − | Enable? − |}
no edit summary
= Registers =
{| class="wikitable" border="1"
{| class="wikitable" border="1"
! NAME
! Old3DS
! PHYSICAL ADDRESS
! Name
! PROCESS ADDRESS
! Address
! WIDTH
! Width
! Used by
|-
|-
| REG_I2C1DATA
| style="background: green" | Yes
| I2C1_DATA
| 0x10161000
| 0x10161000
| 1
| 1
|
|-
|-
| REG_I2C1CNT
| style="background: green" | Yes
| [[#I2C_CNT|I2C1_CNT]]
| 0x10161001
| 0x10161001
| 1
| 1
|
|-
|-
| REG_I2C1CNTEX
| style="background: green" | Yes
| I2C1_CNTEX
| 0x10161002
| 0x10161002
| 2
| 2
|
|-
|-
| REG_I2C1SCL
| style="background: green" | Yes
| I2C1_SCL
| 0x10161004
| 0x10161004
| 2
| 2
|
|-
|-
| REG_I2C2DATA
| style="background: green" | Yes
| I2C2_DATA
| 0x10144000
| 0x10144000
| 1
| 1
|
|-
|-
| REG_I2C2CNT
| style="background: green" | Yes
| [[#I2C_CNT|I2C2_CNT]]
| 0x10144001
| 0x10144001
| 1
| 1
|
|-
|-
| REG_I2C2CNTEX
| style="background: green" | Yes
| I2C2_CNTEX
| 0x10144002
| 0x10144002
| 2
| 2
|
|-
|-
| REG_I2C2SCL
| style="background: green" | Yes
| I2C2_SCL
| 0x10144004
| 0x10144004
| 2
| 2
|
|-
|-
| REG_I2C3DATA
| style="background: green" | Yes
| I2C3_DATA
| 0x10148000
| 0x10148000
| 1
| 1
|
|-
|-
| REG_I2C3CNT
| style="background: green" | Yes
| [[#I2C_CNT|I2C3_CNT]]
| 0x10148001
| 0x10148001
| 1
| 1
|
|-
|-
| REG_I2C3CNTEX
| style="background: green" | Yes
| I2C3_CNTEX
| 0x10148002
| 0x10148002
| 2
| 2
|
|-
|-
| REG_I2C3SCL
| style="background: green" | Yes
| I2C3_SCL
| 0x10148004
| 0x10148004
| 2
| 2
|
|}
== I2C_CNT ==
{| class="wikitable" border="1"
! BIT
! DESCRIPTION
|-
| 0
| Stop (0=No, 1=Stop/last byte)
|-
| 1
| Start (0=No, 1=Start/first byte)
|-
| 2
| Pause (0=Transfer Data, 1=Pause after Error, used with/after Stop)
|-
| 4
| Ack Flag (0=Error, 1=Okay) (For DataRead: W, for DataWrite: R)
|-
| 5
| Data Direction (0=Write, 1=Read)
|-
| 6
| Interrupt Enable (0=Disable, 1=Enable)
|-
| 7
| Start/busy (0=Ready, 1=Start/busy)
|}
|}
= I2C Devices =
{| class="wikitable" border="1"
{| class="wikitable" border="1"
! Device id
! Device id
See the datasheet linked to on the [[Hardware]] page for reference. From that datasheet, for the structure of the I2C register address u8: "Bit 0 is not used, bits 2:1 select the channel, bits 6:3 select one of the UART internal registers. Bit 7 is not used with the I2C-bus interface, but it is used by the SPI interface to indicate a read or a write operation."
See the datasheet linked to on the [[Hardware]] page for reference. From that datasheet, for the structure of the I2C register address u8: "Bit 0 is not used, bits 2:1 select the channel, bits 6:3 select one of the UART internal registers. Bit 7 is not used with the I2C-bus interface, but it is used by the SPI interface to indicate a read or a write operation."