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SDA 6000
PRELIMINARY DATA SHEET
Version 2.1
System Control & Configuration
6 - 5
Micronas
•
Long Hardware Reset
A long hardware reset requires an RSTIN
active time longer than the duration of the
internal reset sequence. The duration of the internal reset sequence is 2056 TCL.
After the internal reset sequence has been completed, the RSTIN
input is sampled.
As long as the reset input is still active the internal reset condition is prolonged.
Accordingly, the internal hardware reset (HWRST) is active until the external reset on
the RSTIN
input becomes inactive.
Note: The hardware reset is also used as a wake up from power down state; in this case
the internal system reset will be lengthened (execution of 1. instruction delayed)
until the oscillator and PLL have been stabilized.
•
Short Hardware Reset
The RSTIN
active time of a short hardware reset is between 16 TCL and 2056 TCL.
If the RSTIN
signal is active for at least 16 TCL clock cycles the internal reset
sequence is started (see below). In case of a short HW-reset, the internal HWRST
signal is prolonged until the reset sequence is finished.
Software Reset
The reset sequence can be triggered at any time via the protected instruction SRST
(Software Reset). This instruction can be executed deliberately within a program, e.g. to
leave bootstrap loader mode, or upon a hardware trap that reveals a system failure.
Watchdog Timer Reset
When the watchdog timer is not disabled during the initialization or serviced regularly
during program execution it will overflow and trigger the reset sequence. Other than
hardware and software reset the watchdog reset completes a running external bus or X-
Bus cycle.
6.1.1
Behavior of I/Os during Reset
During the internal reset sequence all of the M2’s I/O pins are configured as inputs by
clearing the associated direction registers and switching their pin drivers to the high
impedance state. This ensures that the M2 and external devices will not try to drive the
same pin to different levels. Outputs are generally driven to their expected inactive state
during reset. Output pins driven to ‘0’ are: A13 … A0; MEMCLK, CLKEN, XTAL2, COR,
BLANK and TDO. Output pins driven to ‘1’ are: A15 (CAS),A14 (RAS), RD, CSROM,
CSDRAM, WR, P4.5(CS3), P4.4 … P4.0, LDQM and UDQM.
6.1.2
Reset Values for the Controller Core Registers
During the reset sequence the registers of the C166 CBC are preset with a default value.
Most C166 CBC SFRs are cleared to zero, so the interrupt system is off after reset. A
Содержание SDA 6000
Страница 3: ...Contents Overview...
Страница 21: ...Pin Description...
Страница 22: ...SDA 6000 PRELIMINARY DATA SHEET Version 2 1 Pin Descriptions 2 3 Micronas 2 Pin Descriptions...
Страница 29: ...Architectural Overview...
Страница 33: ...C16X Microcontroller...
Страница 34: ...SDA 6000 PRELIMINARY DATA SHEET Version 2 1 C16X Microcontroller 4 3 Micronas 4 C16X Microcontroller...
Страница 88: ...Interrupt and Trap Function...
Страница 122: ...System Control Configuration...
Страница 159: ...SDA 6000 PRELIMINARY DATA SHEET Version 2 1 System Control Configuration 6 40 Micronas...
Страница 160: ...Peripherals...
Страница 282: ...SDA 6000 PRELIMINARY DATA SHEET Version 2 1 Peripherals 7 124 Micronas...
Страница 283: ...Clock System...
Страница 284: ...SDA 6000 PRELIMINARY DATA SHEET Version 2 1 Clock System 8 3 Micronas 8 Clock System...
Страница 288: ...SDA 6000 PRELIMINARY DATA SHEET Version 2 1 Clock System 8 8 Micronas...
Страница 289: ...Sync System...
Страница 290: ...SDA 6000 PRELIMINARY DATA SHEET Version 2 1 Sync System 9 3 Micronas 9 Sync System...
Страница 301: ...Display Generator...
Страница 302: ...SDA 6000 PRELIMINARY DATA SHEET Version 2 1 Display Generator 10 3 Micronas 10 Display Generator...
Страница 348: ...SDA 6000 PRELIMINARY DATA SHEET Version 2 1 Display Generator 10 50 Micronas...
Страница 349: ...D A Converter...
Страница 352: ...SDA 6000 PRELIMINARY DATA SHEET Version 2 1 D A Converter 11 6 Micronas...
Страница 353: ...Slicer and Acquisition...
Страница 354: ...SDA 6000 PRELIMINARY DATA SHEET Version 2 1 Slicer and Acquisition 12 3 Micronas 12 Slicer and Acquisition...
Страница 381: ...Register Overview...
Страница 398: ...SDA 6000 PRELIMINARY DATA SHEET Version 2 1 Register Overview 13 20 Micronas...
Страница 399: ...Elelctrical Characteristics...
Страница 400: ...SDA 6000 PRELIMINARY DATA SHEET Version 2 1 Electrical Characteristics 14 3 Micronas 14 Electrical Characteristics...
Страница 411: ...SDA 6000 PRELIMINARY DATA SHEET Version 2 1 Electrical Characteristics 14 14 Micronas...