HI-6136 Datasheet, PDF (144/206 Pages) Holt Integrated Circuits – 40 MHz SPI Host Interface

HI-6136
Table 11.  Terminal Unlock Word Encoding
Word 1
0xA00A
0xA03A
0xA0CA
0xA0FA
0xA30A
0xA33A
0xA3CA
0xA3FA
0xAC0A
0xAC3A
0xACCA
0xACFA
0xAF0A
0xAF3A
0xAFCA
0xAFFA
Word 2
0x5FF5
0x5FC5
0x5F35
0x5F05
0x5CF5
0x5CC5
0x5C35
0x5C05
0x53F5
0x53C5
0x5335
0x5305
0x50F5
0x50C5
0x5035
0x5005
Initialize RT ²
No auto init. ¹
X
X
X
X
X
X
X
X
Initialize MT ³
No auto init.
X
X
X
X
X
X
X
X
Note 1: Default. No terminal devices (MT or RT) are started. The host must write “Master Configuration Register 1
(0x0000)” to start terminals.
Note 2: The RTENA register bit 6 in register 0x0000 must be set before step 4. During auto-initialization events, the
AUTOEN input pin must be logic 1 before rising edge of MR master reset. After auto-initialization, RTSTEX bit 4 is
automatically set in “Master Configuration Register 1 (0x0000)”, starting Remote Terminal execution.
Note 3: The MTENA register bit 8 in register 0x0000 must be set before step 4. During auto-initialization events, the
AUTOEN input pin must be logic 1 before rising edge of MR master reset. After auto-initialization, the SMT MTENA bit
is automatically set in “Master Configuration Register 1 (0x0000)”, starting Bus Monitor execution.
The terminals can be automatically started (or not started) in any combination. For example, exclusive-ORing
both default unlock Words 1 and 2 with 0x0FF0 results in unlock Word 1 = 0xAFFA and Word 2 = 0x5005. This
combination automatically and simultaneously enables execution for both terminal devices: MT and RT, at every
subsequent auto-initialization from EEPROM. Individual soft resets for a single terminal device will automatically
enable that device, if enabled here.
4. The EECOPY input pin is driven high for at least 1 ms, then driven low. In response, the READY output goes
low while EEPROM memory is written. The unlock code at address 0x0051 is cleared. Device register and RAM
contents are written to the serial EEPROM, one byte at a time.
During programming, terminal checksums are tallied for the RT and SMT terminal devices, if used. An overall 8K
checksum is also tallied. These checksums, stored in the EEPROM, are used for error detection later, during auto-
initialization and soft reset events.
HOLT INTEGRATED CIRCUITS
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