Mitsubishi DS907x SIP, DS5000TK manual Xon/Xoff, CRC/MCON/MSL/RPCTL byte, Mcon, Msl, Rpctl

USER'S GUIDE

unaffected by this command. DS5001/DS5002:

W [CRC/MCON/MSL/RPCTL] byte

Writes byte to the requested register. The SL bit is unaf- fected by this command. This command is discussed in greater detail later in this section.

Z

Set the Security Lock. Only the U and Z commands may be given after the Security Lock is set.

^C

Restarts most operations. N cannot be restarted.

Xon/Xoff

These two characters provide flow control to the serial loader. The serial loader will never issue them, but will respond to both. Xoff (control±S, DS3, 0x13) requests that character transmission stop. Xon (control±Q, DC1, 0x11) requests the resumption of transmission.

NOTES ON SELECTED DS5001FP AND DS5002FP COMMANDS

When using the Include command `I', certain precau- tions are needed, The CRCBIT (bit 0) of the CRC SFR (C1h) must be set or the error message E:NOCRCB is printed. The MSL bit must not be cleared (via loader) or the error message E:NOTCOD is printed. If the PM bit (bit 1) of the MCON SFR (C6h) is one, then CRC_RANGE must be less than or equal to the pro- gram Range, or else the error message E:BADRNG is printed.

When storing an end system, it may not be desirable to lithium±back RAM or a real±time clock. The Newness command `N' will accomplish this. When `N' is issued, the loader will prompt with CONFIRM: after the N is entered. The user must type FRESH without any spaces or deletes and terminate it with a carriage return to put the part into freshness. The message DID NOT CONFIRM is printed if a mistake is made while entering FRESH; otherwise the message POWER DOWN TO MAINTAIN FRESHNESS is printed. The `N' command should be the last function that is executed. After this, the system should be powered down for storage. At this time, the VCCO will be pulled low, removing power from RAM or clock. The newness command may not be executed when talking through the modem to the serial loader. If it is attempted, the error message E:ILLCMD is printed.

The DS5001FP and DS5002FP provide loader com- mands to assist in system checkout. These are `Gº Get and `P' Put. Get will read the values of all four I/O ports. Put is used to write a value to a port. This allows a mea- sure of hardware control while the device is effectively in a reset state. If a port number other than 0, 1, 2, or 3 is used, the error message E:BADREG is printed. Ports 0 and 2 may not be altered when talking to the loader through the RPC interface. The error message E:BADREG is printed if it is attempted. Bits 0 and 1 of port 3 will always be written as ones when port 3 is altered (serial port).

The DS5001FP/DS5002FP write command has more options than the DS5000 version. Any of the following registers/functions can be initialized using the loader. VAL is written to the requested register. If an illegal reg- ister name is entered, the error message E:BADREG is printed.

CRC	This register selects the range over
	which a power±on CRC will be per-
	formed, and enables the process. Only
	bits 0, 4, 5, 6 and 7 of the CRC register
	may be altered. Bits 1, 2, and 3 are left
	alone.
MCON	Controls range, partition, and peripheral
	selects, All but bit 0 of the MCON regis-
	ter may be altered.
MSL	This bit allows the data space in a fixed
	memory (non±partitionable) system to
	be loaded using the loader software.
	MSL only uses the low order bit of value
	to change the MSL bit. In fixed partition
	and 128K mode, if MSL equals 0, pro-
	gram loads/verifies will go to data space.
	Upon entry, MSL will be = 1. MSL has no
	effect in user mode.
RPCTL	RPCTL only uses the low order bit of VAL
	to change bit 0 of the RPCTL register.
	The LSB of the RPCTL is also used to
	determine the Range.

Only record types 00 (data) and 01 (end) may be loaded. Other record types will cause the error mes- sage E:BADREC to be printed out, but loading will con- tinue with the next valid record. The last two bytes of each record contain a checksum. This checksum is

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