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参数资料
| 型号： | TSPC860SRMZPU50D4 |
| 厂商： | E2V TECHNOLOGIES PLC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, 50 MHz, RISC PROCESSOR, PBGA357 |
| 封装： | PLASTIC, BGA-357 |
| 文件页数： | 20/90页 |
| 文件大小： | 2351K |
| 代理商： | TSPC860SRMZPU50D4 |
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27
TSPC860
2129A–HIREL–08/02
Resistance values for internal pull-up and pull-down resistors are not specified because
their values may vary due to process variations and shrinks in die size, and they are not
tested. Typical values are on the order of 5 K
but can vary by approximately a factor
of 2.
Recommended Basic Pin
Connections
Reset Configuration
Some external pin configuration is determined at reset by the hard reset configuration
word. Thus, some decisions as to system configuration (for example, location of BDM
pins) should be made before required application of pull-up and pull-down resistors can
be determined.
RSTCONF should be grounded if the hard reset configuration word is used to configure
the TSPC860 or should be connected to V
CC if the default configuration is used.
Pull-up resistors may not be used on D[0-31] to set the hard reset configuration word, as
the values of the internal pull-down resistors are not specified or guaranteed. To change
a data bus signal from its default logic low state during reset, actively drive that signal
high.
MODCK[1-2] must be used to determine the default clocking mode for the TSPC860.
After hardware reset, the MODCK[1-2] pins change function and become outputs. Thus,
if these alternate functions are also desired, then the MODCK[1-2] configuration should
be set with three-state drivers that turn off after HRESET is negated; however, if
MODCK[1-2] pins’ alternate output functions are not used in the system, they can be
configured with pull-up and pull-down resistors.
Signals with open-drain buffers and active pull-up buffers (HRESET, SRESET, TEA, TS,
TA, BI, and BB) must have external pull-up resistors. These signals include the
following:
Some other input signals do not absolutely require a pull-up resistor, as they may be
actively driven by external logic. However, if they are not used externally, or if the exter-
nal logic connected to them is not always actively driving, they may need external pull-
up resistors to hold them negated. These signals include the following:
PORESET
AS
CR/IRQ3
KR/RETRY/IRQ4/SPKROUT (if configured as KR/RETRY or IRQ4)
Any IRQx (if configured as IRQx)
BR (if the TSPC860’s internal bus arbiter is used)
BG (if an external bus arbiter is used)
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