PC87373 datasheet(55/174 Pages) NSC

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3.0 Device Architecture and Configuration (Continued)

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3.10 SERIAL PORT 2 CONFIGURATION

3.10.1 General Description

Serial Port 2 provides UART functionality by supporting serial data communication with remote peripheral device or modem.

The functional blocks can function as a standard 16450 or 16550 or as an Extended UART.

Serial Port 2 includes four register banks, each containing eight runtime registers, as shown in Section 12.3 on page 145.

All these registers are VDD powered.

3.10.2 Logical Device 2 (SP2) Configuration

Table 18 lists the configuration registers that affect Serial Port 2. Only the last register (F0h) is described here. See Section

3.2.3 on page 36 for descriptions of the other configuration registers. All these registers are VDD powered.

Table 18. Serial Port 2 Conﬁguration Registers

Index

Conﬁguration Register or Action

Type

Power Well

Reset

30h Activate (see Section 3.3.1 on page 40)

R/W

VDD

00h

60h Base Address MSB register. Bits 7-3 (for A15-11) are read only, 00000b.

R/W

VDD

02h

61h Base Address LSB register. Bit 2-0 (for A2-0) are read only, 000b.

R/W

VDD

F8h

70h Interrupt Number and Wake-Up on IRQ Enable register

R/W

VDD

03h

71h Interrupt Type. Bit 1 is R/W; other bits are read only

R/W

VDD

03h

74h Report no DMA Assignment

VDD

04h

75h Report no DMA Assignment

VDD

04h

F0h Serial Port 2 Conﬁguration register

R/W

VDD

02h

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