TEWS TPMC917-10R PMC Module
Product Description
The TPMC917 is a standard single-width 32-bit PMC module providing 4 Mbyte SRAM with battery backup by an on-board lithium cell for all SRAM devices and four ESD-protected RS232 channels(TPMC917-10 only).
The 4 Mbyte NV-SRAM is organized in two banks; each of them provides 512k x 32-bit memory. During normal operation (standard 5V supply applied to the SRAM), the capacity of the lithium cell is monitored every 24 hours by the battery monitor device, and an interrupt can be generated if the battery voltage is too low. The monitor device switches the power supply of the SRAM from the standard 5V to the battery if the 5V supply drops below the threshold level of the battery monitor device. Any active access to the SRAM at this point is executed correctly within 1.5µs. After this time, any further accesses to the SRAM are not possible. A miniature DIP switch allows the selection of the battery backup source either from the on-board lithium cell or from an external battery via the P14 I/Oconnector.
The TPMC917-10 provides four RS232 channels. Each channel has a programmable baud rate up to115.2 Kbaud. The 4-channel UART16C654 provides a 64-byte transmit FIFO and a 64-byte receive FIFO for each channel to significantly reduce the overhead required to provide data to and get data from the transmitter and receiver. The FIFO trigger levels are programmable. The channels are ESD protected up to +/-15kV according to the human body model and IEC1000-4-2.
For applications which do not need the UARTs of the TPMC917-10, the TPMC917-20 provides4 MByte NV-SRAM and has no UARTs.
The TPMC917-21 has a reduced memory size. It provides 2 MByte NV-SRAM and has no UARTs.
Matching/variant models of the same series
According to the official information of TEWS, TPMC917 series includes the following models:
TPMC917-10R
Configuration: 4 MB NV-SRAM+4 channels RS232
TPMC917-20R
Configuration: 4 MB NV-SRAM, no serial port (no UART)
TPMC917-21R
Configuration: 2 MB NV-SRAM, no serial port (no UART)
Technical Specification
Mechanical Interface PCI Mezzanine Card (PMC) Interface Single Size
Electrical Interface PCI Rev. 2.1 compliant33 MHz / 32 bit PCI3.3V and 5V PCI Signaling Voltage
Installation
Security Warning (Lithium Battery)
Please observe the following warnings strictly. If misused, the battery may explode or leak, causing injury or damage to the equipment.
• Keep batteries out of the reach of children. In case of ingestion of a cell or battery, the person involved should seek medical assistance promptly.
• The batteries must be inserted into the equipment with the correct polarity (+ and -).
• Do not use metallic or other conductive extraction tools to replace the batteries.
• Do not attempt to revive used batteries by heating, charging, or other means.
• Do not dispose of batteries in fire. Do not dismantle batteries.
• Do not short-circuit batteries.
• Do not expose batteries to high temperatures, moisture, or direct sunlight.
• Do not place batteries on a conductive surface (anti-static work mat, packaging bag, or foam trays), as it can cause the battery to short.
Battery Backup Selection
The TPMC917 provides two possibilities for battery backup operation: either the on-board Lithium Cell or an external battery connected via the P14 I/O connector. An original packed Lithium Cell is delivered together with the TPMC917. Insert the Lithium Cell with the plus pole "+" visible. A four-position miniature DIP switch is used to select the source for battery backup. Factory configuration is switched: S3, S4 in position "ON" and S1, S2 in position "OFF" to provide battery backup by the onboard Lithium Cell. Switching S3, S4 to the "OFF" position and S1, S2 to the "ON" position enables an external battery connected via the P14 I/O connector as the battery backup source.
