Abstract: This applicaTIon note provides a list of the differences between Dallas Semiconductor / Maxim CommunicaTIons Products DS21354 / DS21554 and DS2154 single chip transceivers (SCTs). The addiTIonal features contained in the DS21354 / DS21554 are highlighted along with the addiTIonal registers required for support of the new features, HDLC controller, interleaved bus operation (IBO), and JTAG.
1. IntroductionThis application note highlights the differences between the DS21354 / DS21554 and the DS2154. The DS21354 / DS21554 is a superset of the DS2154 maintaining a consistent pin out and register set. All of the original features of the DS2154 have been retained and software created for the DS2154 is transferable to the DS21354 / DS21554 with minimal effort. The DS21354 and DS21554 are functionally equivalent with the only difference being the required supply voltage — the DS21354 operates at 3.3V and the DS21554 operates at 5V.
2. Additional Functionality
3. Changes in Register DefinitionsWhen implementing the new features of the DS21354 / DS21554, a priority was placed on preserving the DS2154's register map to facilitate code migration from existing DS2154 designs. This section highlights register additions and differences found in the DS21354 / DS21554.
3.1 New Feature Register UsageHighlights new registers related to new features. Each item can be found in the data sheet under the listed sections.
3.1.1 Common Control Register
3.2 HDLC Controller (section 15)
3.1.2 Interleaved PCM Bus Operation (section 18)
3.2 Bit Assignment Changes within Existing RegistersHighlights bit locations in the DS21354 / DS21554 which have changed from the DS2154.
4. Changes in Device Pin Out 4.1 Package typesThe DS2154 and DS21354 / DS21554 are both offered in a 100 pin 14 x 14 x 1.4 mm LQFP. Values ​​listed are for body dimensions. 4.2 Device Pin Differences 4.2.1 JTAG Pins
4.2.2 Interleaved PCM Bus Pins
4.2.3 Framer Mode Select Pin
·World most famous brand diesel engine: Cummins
·World famous brand High Voltage AC alternator: Stamford, Leroy Somer, Marathon, Faraday, etc
·Advanced and reliable controller: Auto start, AMF & Remote control by PC with RS232/485
·Full range protect function and alarm shutdown feature.
1. IntroductionThis application note highlights the differences between the DS21354 / DS21554 and the DS2154. The DS21354 / DS21554 is a superset of the DS2154 maintaining a consistent pin out and register set. All of the original features of the DS2154 have been retained and software created for the DS2154 is transferable to the DS21354 / DS21554 with minimal effort. The DS21354 and DS21554 are functionally equivalent with the only difference being the required supply voltage — the DS21354 operates at 3.3V and the DS21554 operates at 5V.
2. Additional Functionality
| New Features | Data Sheet Section |
| HDLC controller | 15 |
| JTAG | 17 |
| 8 Mbps interleaved PCM bus operation | 18 |
| 3.3V operation with 5V tolerant I / O (for DS21354) | 17 |
3. Changes in Register DefinitionsWhen implementing the new features of the DS21354 / DS21554, a priority was placed on preserving the DS2154's register map to facilitate code migration from existing DS2154 designs. This section highlights register additions and differences found in the DS21354 / DS21554.
3.1 New Feature Register UsageHighlights new registers related to new features. Each item can be found in the data sheet under the listed sections.
3.1.1 Common Control Register
| Register | Address | Description |
| CCR6 | 1Dh | Common Control Register 6 |
3.2 HDLC Controller (section 15)
| Register | Address | Description |
| HCR | B0h | HDLC Control Register |
| HSR | B1h | HDLC Status Register |
| HIMR | B2h | HDLC Interrupt Mask Register |
| RHIR | B3h | Receive HDLC Information Register |
| RHFR | B4h | Receive HDLC FIFO Register |
| THIR | B6h | Transmit HDLC Information Register |
| THFR | B7h | Transmit HDLC FIFO Register |
| RDC1 | B8h | Receive HDLC DS0 Control Register 1 |
| RDC2 | B9h | Receive HDLC DS0 Control Register 2 |
| TDC1 | BAh | Transmit HDLC DS0 Control Register 1 |
| TDC2 | BBh | Transmit HDLC DS0 Control Register 2 |
3.1.2 Interleaved PCM Bus Operation (section 18)
| Register | Address | Description |
| IBO | B5h | Interleave Bus Operation |
3.2 Bit Assignment Changes within Existing RegistersHighlights bit locations in the DS21354 / DS21554 which have changed from the DS2154.
| Register | Bit # | DS2154 Symbol | DS2154 Description | DS21354 / DS21554 Symbol | DS21354 / DS21554 Description |
| CCR3 | 4 | N / A | Not assigned | ESR | Elastic Store Reset |
| CCR5 | 6 | N / A | Not assigned | RESALGN | Receive Elastic Store Align |
| CCR5 | 5 | N / A | Not assigned | TESALGN | Transmit Elastic Store Align |
4. Changes in Device Pin Out 4.1 Package typesThe DS2154 and DS21354 / DS21554 are both offered in a 100 pin 14 x 14 x 1.4 mm LQFP. Values ​​listed are for body dimensions. 4.2 Device Pin Differences 4.2.1 JTAG Pins
| Pin # | DS21354 / DS21554 | DS2154 | Description |
| 2 | JTMS | NC | IEEE 1149.1 Test Mode Select |
| 4 | JTCLK | NC | IEEE 1149.1 Test Clock Signal |
| 5 | JTRST | NC | IEEE 1149.1 Test Reset |
| 7 | JTDI | NC | IEEE 1149.1 Test Data Input |
| 10 | JTDO | NC | IEEE 1149.1 Test Data Output |
4.2.2 Interleaved PCM Bus Pins
| Pin # | DS21354 / DS21554 | DS2154 | Description |
| 36 | CI | NC | Carry In |
| 54 | CO | NC | Carry Out |
4.2.3 Framer Mode Select Pin
| Pin # | DS21354 / DS21554 | DS2154 | Description |
| 76 | FMS | NC | Framer Mode Select |
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·Engine and alternator shall be mounted on a same frame steel skid.
·Small size, low weight, easy to operating, installation and maintenance.·World most famous brand diesel engine: Cummins
·World famous brand High Voltage AC alternator: Stamford, Leroy Somer, Marathon, Faraday, etc
·Advanced and reliable controller: Auto start, AMF & Remote control by PC with RS232/485
·Full range protect function and alarm shutdown feature.
·Comply with ISO8528 national standard and ISO9001 quality standard.
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