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文档中心 > GR5526 Datasheet/ Peripherals/ I/O/ Mixed Signal I/O Copy URL

Mixed Signal I/O

Introduction

A GR5526 SoC 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_A_PAD_CFG0

  • Name: MSIOA Pad Control Register
  • Description: This register contains the input and output data.
  • Base Address: 0x 4000A1D8
  • Offset: 0x00
  • Reset Value: 0x00000000
表 171 MSIO_A_PAD_CFG0 Register
Bits Field Name RW Reset Description

31:24

RSVD

R

Reserved bits

23:16

MSIO_A_VAL

R

0x0

MSIOA digital value

15:8

MSIO_A_OE_N

RW

0xFF

MSIOA output enable (active low)

Value:

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

7:0

MSIO_A_OUT

RW

0x0

MSIOA output value (valid in output mode)

MSIO_A_PAD_CFG1

  • Name: MSIOA Pad Control Register
  • Description: This register contains the MSIOA configurations.
  • Base Address: 0x 4000A1DC
  • Offset: 0x00
  • Reset Value: 0x00FF0000
表 172 MSIO_A_PAD_CFG1 Register
Bits Field Name RW Reset Description

31:24

MSIO_A_IE_N

RW

0x0

MSIOA input enable (active low)

Value:

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

23:16

MSIO_A_RE_N

RW

0xFF

MSIOA resistor enable (active low)

Value:

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

15:8

MSIO_A_RTYPE

RW

0x0

MSIOA resistor type

Value:

  • 0x0: Pull down.
  • 0x1: Pull up.

7:0

MSIO_A_AE_N

RW

0x0

Analog enable control for MSIOA pad

Value:

  • 0x0: analog mode
  • 0x1: digital mode

MSIO_A_PAD_MCU_OVR

  • Name: MSIOA Using MCU Domain Setting Control Register
  • Description: This register controls MSIOA using the settings from the MCU domain.
  • Base Address: 0x4000A1E0
  • Offset: 0x0
  • Reset Value: 0x00000000
表 173 MSIO_A_PAD_MCU_OVR Register
Bits Field Name RW Reset Description

31:8

RSVD

R

N/A

Reserved bits

7:0

msio_a_mcu_ovr

RW

0x0

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

Value:

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

Electrical Specifications

The electrical parameters for the MSIO_A0–MSIO_A7 are as follows:

表 174 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, VDDIO ≥ 1.7 V

VDDIO – 0.4

VDDIO

V

VOH,M

Output high voltage, 2.5 mA, VDDIO ≥ 2.5 V

VDDIO – 0.4

VDDIO

V

VOH,H

Output high voltage, 2.5 mA, VDDIO ≥ 3 V

VDDIO – 0.4

VDDIO

V

VOL,L

Output low voltage, 2.5 mA, VDDIO ≥ 1.7 V

VSS

VSS + 0.4

V

VOL,M

Output low voltage, 2.5 mA, VDDIO ≥ 2.5 V

VSS

VSS + 0.4

V

VOL,H

Output low voltage, 2.5 mA, VDDIO ≥ 3 V

VSS

VSS + 0.4

V

IOL,L

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

2.5

mA

IOL,M

Current at VSS+0.4 V, output set low, VDDIO ≥ 2.5 V

2.5

mA

IOH,L

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

2.5

mA

IOH,M

Current at VDD-0.4 V, output set high, VDDIO ≥ 2.5 V

2.5

mA

tRF,15pF

Rise/Fall time, 10%–90%, 15 pF load

5

8

ns

tRF,25pF

Rise/Fall time, 10%–90%, 25 pF load

6

13

ns

RPU

Pull-up resistance

70

120

150

kΩ

RPD

Pull-down resistance

70

120

150

kΩ

CPAD

Pad capacitance

5

pF

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