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文档中心 > GR5525 Datasheet/ Peripherals/ I/O/ Mixed Signal I/O Copy URL

Mixed Signal I/O

Introduction

The device has eight individually configurable MSIOs that can be applied by peripherals, digital input\output or analog input.

Functional Description

  • MSIO default state is analog input mode.
  • As analog input for sense ADC or Comparator.
  • As digital MSIOs for input/output, no interrupt.
  • To multiplex some different peripherals.
  • For digital modules with high timing requirements, it is recommended to increase the MSIO drive current.

Registers

MSIO_APAD_CFG0

  • Name: MSIO Pad Control Register
  • Description: This register contains the input and output data.
  • Base Address: 0x4000A1D4
  • Offset: 0x00
  • Reset Value: 0x00FF0000
Table 299 MSIO_APAD_CFG0 Register
Bits Field Name RW Reset Description

31:24

MSIO_VAL

R

MSIO read value

23:16

MSIO_IE_N

RW

0xFF

MSIO input enable

Value:

  • 0x0: Disable MSIO_x input.
  • 0x1: Enable MSIO_x input.

15:8

MSIO_OE_N

RW

0x0

MSIOA output enable (active low)

Value:

  • 0x0: Disable MSIO_x output.
  • 0x1: Enable MSIO_x output.

7:0

MSIO_OUT

RW

0x0

MSIO output value (valid in output mode)

MSIO_APAD_CFG1

  • Name: MSIO Pad Control Register
  • Description: This register contains the MSIOA configurations.
  • Base Address: 4000A1D8
  • Offset: 0x00
  • Reset Value: 0x00000000
Table 300 MSIO_APAD_CFG1 Register
Bits Field Name RW Reset Description

31:16

RSVD

R

Reserved bits

15:8

MSIO_RTYPE

RW

0x0

MSIO resistor type

Value:

  • 0x0: Pull down.
  • 0x1: Pull up.

7:0

MSIO_AE_N

RW

0x0

MSIO input enable (active low)

Value:

  • 0x0: Disable input.
  • 0x1: Enable input.

MSIO_APAD_MCU_OVR

  • Name: MSIO Using MCU Domain Setting Control Register
  • Description: This register controls MSIO using the settings from the MCU domain.
  • Base Address: 0x4000A1E0
  • Offset: 0x0
  • Reset Value: 0x00000000
Table 301 MSIO_APAD_MCU_OVR Register
Bits Field Name RW Reset Description

31:8

RSVD

R

N/A

Reserved bits

7:0

MSIO_MCU_OVR

RW

0x0

Use the settings from MCU domain, only valid when MCU domain is ON

Value:

  • 0x0: Use settings in MSIO_APAD_CFG as GPIO.
  • 0x1: Use PAD MUX settings in MCU.

Electrical Specifications

The electrical parameters for the MSIO_0–MSIO_7 are as follows:

Table 302 GPIO electrical specifications
Parameter Description Min. Typ. Max. Unit

VIH

Input high voltage

VDDIO x 0.7

VDDIO

V

VIL

Input low voltage

VSSIO

VDDIO x 0.3

V

VOH,L

Output high voltage, 2.5 mA, VDD ≥ 1.7 V

VDD – 0.4

VDD

V

VOH,M

Output high voltage, 2.5 mA, VDD ≥ 2.5 V

VDD – 0.4

VDD

V

VOH,H

Output high voltage, 2.5 mA, VDD ≥ 3 V

VDD – 0.4

VDD

V

VOL,L

Output low voltage, 2.5 mA, VDD ≥ 1.7 V

VSS

VSS + 0.4

V

VOL,M

Output low voltage, 2.5 mA, VDD ≥ 2.5 V

VSS

VSS + 0.4

V

VOL,H

Output low voltage, 2.5 mA, VDD ≥ 3 V

VSS

VSS + 0.4

V

IOL

Current at VSS+0.4 V, output set low, VDD ≥1.7 V

7

mA

IOH

Current at VDD-0.4 V, output set high, VDD ≥ 1.7 V

7

mA

RPU

Pull-up resistance

70

120

150

kΩ

RPD

Pull-down resistance

10

kΩ

CPAD

Pad capacitance

10

pF

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