SPEAR320S datasheet(38/113 Pages) STMICROELECTRONICS

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Pin description

SPEAr320S

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Doc ID 022508 Rev 2

3.4.3

Alternate functions

Other peripheral functions are listed in the Alternate Functions column of Table 13:

PL_GPIO / PL_CLK pins description and can be individually enabled/disabled configuring

the bits of a dedicated control register.

3.4.4

Legacy configuration modes

This section describes the legacy operating modes created by using a selection of the

embedded IPs. These 4 modes provide for backward-compatiblity with existing SPEAr320

hardware applications. Mode 1 is the default mode for SPEAr320S.

The following modes can be selected by software through programming of dedicated

configuration registers (see Figure 3: Hierarchical multiplexing scheme).

●

Mode 1: HMI automation mode

●

Mode 2: MII automation networking mode

●

Mode 3: Expanded automation mode

●

Mode 4: Printer mode

Table 15 shows the IO functions available in each mode.

Mode 1 is the default mode for SPEAr320S.

Mode 1: HMI automation mode

In this example, HMI automation networking operating mode provides the following features

with Mode 1 selected and alternate functions for UART0, SSP0 and I2C0 enabled. Other

feature combinations are possible using different alternate functions.

●

LCD interface (up to 1024x768, 24-bit LCD controller, TFT and STN panels)

●

NAND Flash interface (8 bits, 4 chip selects)

●

2 CAN 2.0 interfaces

●

3 UARTs

–

1 with hardware flow control (up to 3 Mbps)

–

2 with software flow control (baud rate up to 7 Mbps)

●

Touchscreen facilities

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3 independent SSP synchronous serial ports (SPI, Microwire or TI protocol)

●

2 independent I2C interfaces

●

GPIOs with interrupt capability

●

SDIO interface supporting SPI, SD1, SD4 and SD8 mode

●

1 PWM output (PWM3)

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