參數(shù)資料
型號(hào): MC7457VG867NC
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 867 MHz, RISC PROCESSOR, CBGA483
封裝: 29 X 29 MM, 3.22 MM HEIGHT, 1.27 MM PITCH, ROHS COMPLIANT, CERAMIC, BGA-483
文件頁(yè)數(shù): 54/73頁(yè)
文件大小: 1715K
代理商: MC7457VG867NC
MPC7457 RISC Microprocessor Hardware Specifications, Rev. 7
58
Freescale Semiconductor
System Design Information
Figure 26. JTAG Interface Connection
HRESET
From Target
Board Sources
HRESET
13
SRESET
11
VDD_SENSE
6
5 1
15
2 k
Ω
10 k
Ω
10 k
Ω
10 k
Ω
OVDD
CHKSTP_IN
8
TMS
TDO
TDI
TCK
TMS
TDO
TDI
TCK
9
1
3
4
TRST
7
16
2
10
(if any)
COP
He
ade
r
14 2
Key
QACK
OVDD
10 k
Ω
OVDD
TRST
10 k
Ω
OVDD
10 k
Ω
10 k
Ω
QACK
CHKSTP_OUT
3
13
9
5
1
6
10
2
15
11
7
16
12
8
4
KEY
No Pin
COP Connector
Physical Pin Out
10 k
Ω 4
OVDD
1
2 k
Ω 3
0
Ω 5
12 6
NC
Notes:
1. RUN/STOP, normally found on pin 5 of the COP header, is not implemented on the MPC7457. Connect
pin 5 of the COP header to OVDD with a 10-kΩ pull-up resistor.
2. Key location; pin 14 is not physically present on the COP header.
3. Component not populated. Populate only if debug tool does not drive QACK.
4. Populate only if debug tool uses an open-drain type output and does not actively deassert QACK.
5. If the JTAG interface is implemented, connect HRESET from the target source to TRST from the COP
header though an AND gate to TRST of the part. If the JTAG interface is not implemented, connect
HRESET from the target source to TRST of the part through a 0-
Ω isolation resistor.
6. Though defined as a No-Connect, it is a common and recommended practice to use pin 12 as an
additional GND pin for improved signal integrity.
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