USB4715

DS00002514B-page 14



2022 Microchip Technology Inc. and its subsidiaries

3.3.4

PROG_FUNC[8:1] CONFIGURATION (CONFIG_STRAP_[2:1])

The USB4715 provides 8 programmable function pins (

PROG_FUNC[8:1]). These pins can be configured to 6 pre-

defined configurations via the

CONFIG_STRAP_[2:1] pins. These configurations are selected via external resistors on

the

CONFIG_STRAP_[2:1] pins, as detailed in Table 3-5. Resistor values and combinations not detailed in Table 3-5

are reserved and should not be used.

A summary of the configuration pin assignments for each of the 6 configurations is provided in Table 3-6. For details on

behavior of each programmable function, refer to Table 3-7.

TABLE 3-4:

CFG_BC_EN RESISTOR ENCODING

CFG_NON_REM Resistor Value

Setting

200 kΩ Pull-Down

No battery charging

200 kΩ Pull-Up

Port 1 battery charging

10 kΩ Pull-Down

Port 1, 2 battery charging

10 kΩ Pull-Up

Port 1, 2, 3 battery charging

10 Ω Pull-Down

Port 1, 2, 3, 4 battery charging

TABLE 3-5:

CONFIG_STRAP_[2:1] RESISTOR ENCODING

Mode

CONFIG_STRAP_2

Resistor Value

CONFIG_STRAP_1

Resistor Value

Configuration 1

200 kΩ Pull-Down

200 kΩ Pull-Down

Configuration 2

200 kΩ Pull-Down

200 kΩ Pull-Up

Configuration 3

200 kΩ Pull-Down

10 kΩ Pull-Down

Configuration 4

200 kΩ Pull-Down

10 kΩ Pull-Up

Configuration 5

200 kΩ Pull-Down

10 Ω Pull-Down

Configuration 6

200 kΩ Pull-Down

10 Ω Pull-Up

TABLE 3-6:

PROG_FUNC[8:1] FUNCTION ASSIGNMENT

Pin

Configuration

1

Configuration

2

Configuration

3

Configuration

4

Configuration

5

Configuration

6

PROG_FUNC_1

SMB1_DAT

SMB1_DAT

SMB1_DAT

SMB1_DAT

SMB1_DAT

SMB1_DAT

PROG_FUNC_2

I2S_LRCK

UART_TX

CONNECT_IND1

UART_TX

UART_TX

I2S_LRCK

PROG_FUNC_3

I2S_SDOUT

UART_RX

CONNECT_IND2

UART_RX

UART_RX

I2S_SDOUT

PROG_FUNC_4

I2S_SDIN

GPIO6

CONNECT_IND3

GPIO6

GPIO6

I2S_SDIN

PROG_FUNC_5

I2S_MCLK

GPIO8

GPIO8

GPIO8

SMB2_DAT

I2S_MCLK

PROG_FUNC_6

I2S_SCK

GPIO10

GPIO10

GPIO10

SMB2_CLK

I2S_SCK

PROG_FUNC_7

MIC_DET

GPIO11

CONNECT_IND4

GPIO11

GPIO11

GPIO11

PROG_FUNC_8

SMB1_CLK

SMB1_CLK

SMB1_CLK

SMB1_CLK

SMB1_CLK

SMB1_CLK

TABLE 3-7:

PROGRAMMABLE FUNCTIONS DESCRIPTIONS

Function

Buffer

Type

Description

UART Interface