Hewlett-Packard LaserJet 1320(n)
To be more specific, what is described here, is the printer's mainboard, often called "formatter board". At least two different models are available:
- CB355: with USB & parallel port
- CB356: with USB & RJ-45
Model CB356
In the CB356 two systems are integrated on one board. The primary system is the main printer driver, accessible via USB, responsive to the reset switch and controlling all printer parts via dedicated (flat) cable sockets. The secondary system is independent of the primary and only provides network functionalities, including a print server. The systems interact only via an exposed interface, which looks like an unsoldered IDE connection, it's not IDE though, rather for modularity or testpoints for the interaction. May even be a parallel port, which is receiving input directly from the secondary system. The latter idea is rather probable, since this allows using the same primary system for both, CB355 and CB356.
| Serial console | 2x | both systems have it | |
|---|---|---|---|
| JTAG | 2x | both systems have it, system 1: P1+P2, system 2: P3 | |
Primary system: Printer driver
| SoC 1 | Motorola/Freescale ColdFire 4: 133 MHz MIPS | 1825-0104 SC414445VM DD11448; main printer driver: online resources | |
|---|---|---|---|
| ROM (firmware) | 4 MB MASK ROM | Macronix MX23L3213TC-90G, CB355-60203: datasheet | |
| RAM | 16 MB SDRAM | 48LC8M16A2: datasheet | |
| RAM expansion slot | max. 128 MB | 100-pin DIMM with SDRAM required, e.g. 64ms refresh, 100MHz operating frequency | |
| EEPROM | 64k | 24LC641: I²C-driven, datasheet | |
| LEDs | LED blink driver | Philips PCA9551, I²C-driven | |
| other | octal latch | Philips LVC573A: datasheet | |
| USB | yes | 1x host | |
| Parallel port | yes(?) | 1x onboard, functions as hardconnected I/O port to the secondary system and secondary system's serial console | |
Secondary system: Print server
| SoC 2 | ARM? | Philips ARM VY22566-3 1825-0084 | |
|---|---|---|---|
| LAN | 10/100 | Broadcom BCM5231A4KPTG-P14 | |
| Flash (firmware) | 4 MB | Spansion AM29LV320DB-90ED: datasheet | |
| RAM | 8 MB SDRAM | Samsung K4S641632H-UC75: datasheet | |
toh/hp/laserjet1320.txt · Last modified: 2012/12/29 20:02 by miniplatine