參數(shù)資料
型號(hào): IDT79RC32T333-100DH
廠商: IDT, Integrated Device Technology Inc
文件頁(yè)數(shù): 26/30頁(yè)
文件大?。?/td> 0K
描述: IC MPU 32BIT CORE 100MHZ 208-QFP
產(chǎn)品變化通告: Product Discontinuation 07/Dec/2009
標(biāo)準(zhǔn)包裝: 24
系列: Interprise™
處理器類型: RISC 32-位
速度: 100MHz
電壓: 2.5V
安裝類型: 表面貼裝
封裝/外殼: 208-BFQFP
供應(yīng)商設(shè)備封裝: 208-PQFP(28x28)
包裝: 托盤
其它名稱: 79RC32T333-100DH
5 of 30
May 4, 2004
IDT 79RC32333
Pin Description Table
The following table lists the pins provided on the RC32333. Note that those pin names followed by “_n” are active-low signals. All external pull-ups
and pull-downs require 10 k resistor.
Name
Type
Reset
State
Status
Drive
Strength
Capability
Description
Local System Interface
mem_data[31:0]
I/O
Z
High
Local system data bus
Primary data bus for memory. I/O and SDRAM.
mem_addr[22:2]
I/O
[22:10] Z
[9:2] L
[22:17] Low
[16:2] High
Memory Address Bus
These signals provide the Memory or DRAM address, during a Memory or DRAM bus transaction. During
each word data, the address increments either in linear or sub-block ordering, depending on the transac-
tion type. The table below indicates how the memory write enable signals are used to address discreet
memory port width types.
mem_addr[22] Alternate function: reset_boot_mode[1].
mem_addr[21] Alternate function: reset_boot_mode[0].
mem_addr[20] Alternate function: reset_pci_host_mode.
mem_addr[19] Alternate function: modebit [9].
mem_addr[18] Alternate function: modebit [8].
mem_addr[17] Alternate function: modebit [7].
mem_addr[16] Alternate function: sdram_addr[16].
mem_addr[15] Alternate function: sdram_addr[15].
mem_addr[14] Alternate function: sdram_addr[14].
mem_addr[13] Alternate function: sdram_addr[13].
mem_addr[11] Alternate function: sdram_addr[11].
mem_addr[10] Alternate function: sdram_addr[10].
mem_addr[9] Alternate function: sdram_addr[9].
mem_addr[8] Alternate function: sdram_addr[8].
mem_addr[7] Alternate function: sdram_addr[7].
mem_addr[6] Alternate function: sdram_addr[6].
mem_addr[5] Alternate function: sdram_addr[5].
mem_addr[4] Alternate function: sdram_addr[4].
mem_addr[3] Alternate function: sdram_addr[3].
mem_addr[2] Alternate function: sdram_addr[2].
mem_cs_n[5:0]
Output
H
Low
Memory Chip Select Negated Recommend an external pull-up.
Signals that a Memory Bank is actively selected.
mem_oe_n
Output
H
High
Memory Output Enable Negated Recommend an external pull-up.
Signals that a Memory Bank can output its data lines onto the cpu_ad bus.
mem_we_n[3:0]
Output
H
High
Memory Write Enable Negated Bus
Signals which bytes are to be written during a memory transaction. Bits act as Byte Enable and
mem_addr[1:0] signals for 8-bit or 16-bit wide addressing.
Table 1 Pin Descriptions (Part 1 of 6)
Port Width
Pin Signals
mem_we_n[3]
mem_we_n[2] mem_we_n[1]
mem_we_n[0]
DMA (32-bit) mem_we_n[3]
mem_we_n[2] mem_we_n[1]
mem_we_n[0]
32-bit
mem_we_n[3]
mem_we_n[2] mem_we_n[1]
mem_we_n[0]
16-bit
Byte High Write Enable mem_addr[1]
Not Used (Driven
Low)
Byte Low Write
Enable
8-bit
Not Used (Driven High) mem_addr[1]
mem_addr[0]
Byte Write Enable
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