Lapis ML610Q111, User Manual

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ML610Q111/ML610Q112 User’s Manual
Chapter 12 UART
FEUL610Q111 12-23
12.4.4 Functioning PB3(TXD1) and PB2(RXD1) as the UART
Set the PB3MD1 bit (bit3 of PBMOD1 register) to “1” and set the PB2MD1(bit2 of PBMOD1 register) to “0”, and set the
PB3MD0-PB2MD0 bits(bit3-2 of PBMOD0 register) to “0”, for specifying the UART as the tertiary function of PB3 and
the primary function of PB2.
Register name PBMOD1 register (Address: 0F25DH)
Bit 7 6 5 4 3 2 1 0
Bit name
PB7MD1 PB6MD1 PB5MD1 PB4MD1 PB3MD1 PB2MD1 PB1MD1 PB0MD1
Setting value * * * * 1 0 * *
Register name PBMOD0 register (Address: 0F25CH)
Bit 7 6 5 4 3 2 1 0
Bit name
PB7MD0 PB6MD0 PB5MD0 PB4MD0 PB3MD0 PB2MD0 PB1MD0 PB0MD0
Setting value * * * * 0 0 * *
Set the PB3C1 bit (bit3 of PBCON1 register) to "1", the PB3C0 bit (bit3 of PBCON0 register) to "1", and the PB3DIR bit
(bit3 of PBDIR register) to "0" for specifying the state mode of the PB3 pin to CMOS output.
Set the PB2DIR bit (bit2 of PBDIR register) to “1” for specifying the PB2 as an input pin.
The set value ($) is arbitrary for the PB2C1 and PB2C0 bits. Select an arbitrary input mode depending on the state of the
external circuit to which the PB2pin is connected.
Register name PBCON1 register (Address: 0F25BH)
Bit 7 6 5 4 3 2 1 0
Bit name
PB7C1 PB6C1 PB5C1 PB4C1 PB3C1 PB2C1 PB1C1 PB0C1
Setting value * * * * 1 $ * *
Register name PBCON0 register (Address: 0F25AH)
Bit 7 6 5 4 3 2 1 0
Bit name
PB7C0 PB6C0 PB5C0 PB4C0 PB3C0 PB2C0 PB1C0 PB0C0
Setting value * * * * 1 $ * *
Register name PBDIR register (Address: 0F259H)
Bit 7 6 5 4 3 2 1 0
Bit name
PB7DIR PB6DIR PB5DIR PB4DIR PB3DIR PB2DIR PB1DIR PB0DIR
Setting value * * * * 0 1 * *
The PB3D, PB2D bit (bit3-2 of PBD register) data can either be "0" or "1" (not need to be set).
Register name PBD register (Address: 0F258H)
Bit 7 6 5 4 3 2 1 0
Bit name
PB7D PB6D PB5D PB4D PB3D PB2D PB1D PB0D
Setting value * * * * ** ** * *
* : Bit not related to the UART function
** : Don’t care $: Optional