RYZ024A

Datasheet

R19DS0115EU0101 Rev.1.01

Page 4 of 38

Nov.14.22

Pad #

Pad Name

Primary

Function

Alternate

Function1

Power

Group

Direction

Pad

Type2

State at

reset

UART2

25

GPIO18/

RTS2/DSR0

GPIO18

RTS2/DSR

0

PVDD_1V

8

In/Out

BIDIR

HighZ, 2 mA

UART2

24

GPIO19/TXD3

GPIO19

TXD3

PVDD_1V

8

In/Out

BIDIR

HighZ, 2 mA

In for primary function, UART3

22

GPIO20/RXD3

GPIO20

RXD3

PVDD_1V

8

In/Out

BIDIR

Out-1, 2 mA

Out for primary function, UART3

21

GPIO21/CTS3

GPIO21

CTS3

PVDD_1V

8

In/Out

BIDIR

Out-1, 2 mA

UART3

23

GPIO22/RTS3

GPIO22

RTS3

PVDD_1V

8

In/Out

BIDIR

Out-1, 2 mA

UART3

1. Alternate functions will be available in future versions via SW upgrade.

2. UART pad types electrical characteristics are detailed in Table 19.

High-Speed UARTs Flow Control Signals

•

CTS0, CTS1, CTS2, CTS3: Clear-To-Send signals of resp. UART0, UART1, UART2, UART3 active low,

of the RYZ024A. To be connected to the CTS of the remote UART device. See Table 3.

Leave CTS unconnected if hardware flow control is not used.

•

RTS0, RTS1, RTS2, RTS3: Ready-To-Send signals resp. UART0, UART1, UART2, UART3 active low,

of the RYZ024A. To be connected to the RTS of the remote UART device. Tie to a 1 kOhm pull-down on

RTS pin when flow control is not used. If it is connected to an external component (like a RS232 driver),

the user should make sure that this component will present a low level to the RYZ024A. See Figure 3.

Figure 3 represents the typical implementation for the hardware flow control.

Figure 3. UART Convention and Flow Control

Note:

See Module Integration Guide for details on UART connection.

RYZ024A

Application MCU