PC87591L datasheet(2/437 Pages) NSC

2 / 437 page

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Revision 1.07

Features (Continued)

Device-Speciﬁc Information

The following table compares features for the devices in the PC87591x family. The features listed below are a superset of

the PC87591x family.

Features

■

Processing Unit

— CompactRISC CR16B 16-bit embedded RISC pro-

cessor core (the “core”)

— 2 Mbyte address space

■

Internal Memory

— Up to 128 Kbytes of on-chip ﬂash memory (4 Kbytes

of ROM in the PC87591L)

— Supports BIOS (ﬂash) memory sharing with PC host

— On-chip ﬂash is ﬁeld upgradable by host, CR16B,

parallel interface or JTAG

— Boot blocks for both CR16B and Host Code

— Memory contents protection and security

— Hardware-protected boot zone with block protection

circuit

— 2K (PC87591E/L) or 4K of on-chip RAM (PC87591S)

— All memory types can hold both code and data

■

Expansion Memory (Optional in 176-pin package)

— Up to 1 Mbyte of additional code and data

— Supports BIOS (ﬂash) memory sharing with PC host

— Supports external memory power-down mode

— Field upgradable with ﬂash or SRAM devices

— Supports host-controlled code download and up-

date

— Bus Interface Unit (BIU)

❏

Three address zones for static devices (SRAM,

ROM, ﬂash, I/O)

❏

Conﬁgurable wait states and fast-read, single-

cycle bus cycles

❏

8- or 16-bit wide bus

■

LPC System Interface

— Synchronous cycles, up to 33 MHz bus clock

— Serial IRQ

— I/O and Memory read and write cycles

— Bootable memory support

— Bus Master read and write cycles

— Reset input

— Base Address (BADDR) strap to determine the base

address of the Index-Data register pair

— LPCPD and CLKRUN support

— FWH Transaction support

■

Security Function Support

— Random Number Generator (RNG)

— Full Random using temperature, voltage and system

noise.

— Memory access protection

Embedded Controller System Features

■

Host Bus Interface (HBI)

— Three host interface channels, typically used for the

KBC, ACPI Private or Shared EC channels

— 8042 KBC standard Interface (legacy 6016, 6416)

— Intel 80C51SL compatible

— IRQ1 and IRQ12 support

— Fast Gate A20 and Fast Host Reset via ﬁrmware

— PM interface port (legacy 6216, 6616)

— ACPI Embedded Controller with either Shared or

Private interface

— IRQ, SMI or SCI generation

Function

PC87591E

128-Pin

PC87591E

176-Pin

PC87591S

128-Pin

PC87591S

176-Pin

PC87591L

176-Pin

Flash Size

64K

128K

–

ROM Size

––––

RAM Size

2K2K4K4K2K

General-Purpose Input/Output Ports (GPIO)

Shared BIOS

YES

RNG

YES

Memory Protection

YES

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