參數資料
型號: ADSP-TS101SAB1Z000
廠商: Analog Devices Inc
文件頁數: 6/48頁
文件大小: 0K
描述: IC DSP CONTROLLER 6MBIT 625-BGA
標準包裝: 1
系列: TigerSHARC®
類型: 定點/浮點
接口: 主機接口,連接端口,多處理器
時鐘速率: 250MHz
非易失內存: 外部
芯片上RAM: 768kB
電壓 - 輸入/輸出: 3.30V
電壓 - 核心: 1.20V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 625-BBGA
供應商設備封裝: 625-PBGA(27x27)
包裝: 托盤
Rev. C
|
Page 14 of 48
|
May 2009
ADSP-TS101S
MSH
O/T (pu
3)
nc
Memory Select Host. MSH is asserted whenever the DSP accesses the host address space
(ADDR31:28
0b0000). MSH is a decoded memory address pin that changes concurrently with
ADDR pins. In a multiprocessor system, the bus master DSP drives MSH.
BRST2
I/O/T (pu3)
nc
Burst. The current bus master (DSP or host) asserts this pin to indicate that it is reading or writing
data associated with consecutive addresses. A slave device can ignore addresses after the first
one and increment an internal address counter after each transfer. For host-to-DSP burst
accesses, the DSP increments the address automatically while BRST is asserted.
1 The address and data buses may float for several cycles during bus mastership transitions between a TigerSHARC processor and a host. Floating in this case means that these
inputs are not driven by any source and that dc-biased terminations are not present. It is not necessary to add pull-ups as there are no reliability issues and the worst-case
power consumption for these floating inputs is negligible. Unconnected address pins may require pull-ups or pull-downs to avoid erroneous slave accesses, depending on
the system. Unconnected data pins may be left floating.
2 The internal pull-up may not be sufficient. A stronger pull-up may be necessary.
3 See Electrical Characteristics on Page 20 for maximum and minimum current consumption for pull-up and pull-down resistances.
4 The internal pull-down may not be sufficient. A stronger pull-down may be necessary.
Table 6. Pin Definitions—External Port Arbitration
Signal
Type
Term
Description
BR7–0
I/O
epu
Multiprocessing Bus Request Pins. Used by the DSPs in a multiprocessor system to arbitrate for
bus mastership. Each DSP drives its own BRx line (corresponding to the value of its ID2–0 inputs)
and monitors all others. In systems with fewer than eight DSPs, set the unused BRx pins high.
ID2–0
1
I (pd
2)
au
Multiprocessor ID. Indicates the DSP’s ID. From the ID, the DSP determines its order in a multi-
processor system. These pins also indicate to the DSP which bus request (BR0–BR7) to assert
when requesting the bus: 000 = BR0, 001 = BR1, 010 = BR2, 011 = BR3, 100 = BR4, 101 = BR5,
110 = BR6, or 111 = BR7. ID2–0 must have a constant value during system operation and can
change during reset only.
BM
O (pd
au
Bus Master. The current bus master DSP asserts BM. For debugging only. At reset this is a strap
pin. For more information, see Table 16 on Page 19.
BOFF
I
epu
Back Off. A deadlock situation can occur when the host and a DSP try to read from each other’s
bus at the same time. When deadlock occurs, the host can assert BOFF to force the DSP to
relinquish the bus before completing its outstanding transaction, but only if the outstanding
transaction is to host memory space (MSH).
BUSLOCK
3
O/T (pu
2)
nc
Bus Lock Indication. Provides an indication that the current bus master has locked the bus.
HBR
I
epu
Host Bus Request. A host must assert HBR to request control of the DSP’s external bus. When
HBR is asserted in a multiprocessing system, the bus master relinquishes the bus and asserts
HBG once the outstanding transaction is finished.
Type column symbols: A = asynchronous; G = ground; I = input; O = output; o/d = open drain output; P = power supply;
pd = internal pull-down approximately 100 k; pu = internal pull-up approximately 100 k; T = three-state
Term (for termination) column symbols: epd = external pull-down approximately 10 k to VSS; epu = external pull-up approximately 10 k
to VDD-IO, nc = not connected; au = always used.
Table 5. Pin Definitions—External Port Bus Controls (Continued)
Signal
Type
Term
Description
Type column symbols: A = asynchronous; G = ground; I = input; O = output; o/d = open drain output; P = power supply;
pd = internal pull-down approximately 100 k; pu = internal pull-up approximately 100 k; T = three-state
Term (for termination) column symbols: epd = external pull-down approximately 10 k to VSS; epu = external pull-up approximately 10 k
to VDD-IO, nc = not connected; au = always used.
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