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EPC635 数据表(PDF) 69 Page - Espros Photonics corp |
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EPC635 数据表(HTML) 69 Page - Espros Photonics corp |
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69 / 97 page  8. Control registers and EEPROM 8.1. Memory map The epc635 control registers (RAM) are used for controlling all features of the chip. They are organized as 256x8 bit into 0x00 ... 0xFF ad- dress locations. The address space 0x80 ... 0xFF is EEPROM backed-up. Parameters in this section can be stored permanently between the power off/on cycles. All registers can be accessed through I2C interface by the application CPU (see chapter 5.4. I2C Slave). Multiple byte registers are stored as big-endian in the memory map. It is further split into two pages as Control Page (0x00 ... 0x7F) and as EEPROM Page-0 (0x80 ... 0xFF). 0x00 IC_TYPE IC_VERSION 0x01 0x10 0x7F Control page 8 bit registers MT_0_hi MT_0_mi 0x11 EE_PAGE EE_ADDR 0x22 0x23 0x40 0x41 0x47 0x48 0x00 Instruction #0 Instruction #1 Instruction #63 0x01 0x3F TCMI sequencer memory 0x00 Instruction #0 Instruction #1 Instruction #191 0x01 0xBF Pixel sequencer memory 0x80 CLK_enables 0xFF 0xFE 0xFD 0xFC 0xFB PART_VERSION PART_TYPE CHIP_ID_LSB CHIP_ID_MSB 0xFA 0xF9 0xF8 WAFER_ID_LSB WAFER_ID_MSB 0xF7 0xF6 0xF0 EEPROM page 8 bit registers ID Section 0x80 0xFF 0xFC 0xFB 0xF0 EEPROM 8 bit registers Copy after reset Direct access Indirect access through EEPROM page and access registers Figure 68: Memory Map 8.2. Control page The control page contains only RW accessible configuration registers with default values during startup. The content can be changed via I2C interface. The changed values are preserved as long as the IC is powered. The registers reset back to their default values with a pow- er-reset cycle or with a reset cycle alone. 8.3. EEPROM page, EEPROM and its charge pump The epc635 has an 128x8-bit embedded EEPROM to store operation parameters, trimming and calibration values. The EEPROM page address space (RAM) contains RW accessible configuration registers. Their content can be saved into the on-chip 128 x 8-bit EEPROM. It is mapped exactly one-to-one in the same RAM address space. There are various methods how the content of EEPROM can be saved or copied back and forth with the actual RW configuration registers (for details, refer to chapter 5.4.7., Control commands). © 2017 ESPROS Photonics Corporation Characteristics subject to change without notice 69 / 97 Datasheet_epc635-V1.02 www.espros.com |
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