Decryption e-book 3: MCU (Jun Zheng)

Hanwang technology used Marvell's xscal (ARM architecture) earlier ). Later, it is said that for power consumption and price considerations, all the products of Hanwang, except the dual-brand t61 (Alex), use the products provided by Beijing junzheng. Junzheng's 4740 is based on the mips architecture and features a clock speed of up to MHz. The advantage lies in power consumption and price, and the disadvantage lies in the running speed. As a result, hanking will introduce the ARM-based I. MX51 series processor in the next generation of hanking E-800. From arm to MIPS to arm, an interesting cycle has been completed.

Junzheng Technology launched a processing chip that can be used for e-book readers very early. It has been involved for a long time. Its advantage is that the cost control is good, but the frequency is low, last year, jz4740 was launched as a 32-bit embedded processor with high integration level. The mips architecture is suitable for e-books with low power consumption. The specification is as follows: 360 MHz xburst cpuxburst RISC instruction set, supports Linux and wincexburst SIMD instruction sets, and supports multimedia acceleration xburst 8-level assembly line microarchitecture 16 k I-cache, 16 K D-Cache32-entry dual-pages joint-TLB, 4 entry instruction TLB and 4 entry data TLB hardware debugging tool, supports smart prefetch acceleration through the JTAG port. supports video frame resizecolor space conversion, a video processing unit of multimedia applications: 420/444/422 YUV to RGB convert storage subsystem 8/16/32-bit static memory interface 16/32-bit SDRAM interface 8/16-bit NAND Flash interface, Reed-Solomon hardware ECC for MLC ty Pe nand Flash nand flash Boot supports 6-channel descriptor based DMA controller clock and power management frequency to dynamically change the low power consumption mode: idle, sleep, Hibernate avinterface ac97/I2S interface audio codec, 18-bit DAC, 16-bit adccamera interface, supports ccir656 input LCD controller: 18 bits, support both RGB and MCU interface, 800*600 resolution chip peripherals RTC interrupt controller, timer, wdt, pwmi2c interface 2 SPI interface 2 UART interface 1 USB 1.1 host controller, full speed1 USB 2.0 device controller, high speedmmc/SD/sdio controller 6-channel 12-bit SADC, supports touch screen control and battery voltage detection process specification encapsulation: 193 ball, 1 3mm * 13mm PBGA, 0.8mm pitch process: 0.18um CMOS, we can see that this is a chip with a high degree of integration and supports Win CE and Linux.

e-book decryption 3: MCU (Jun Zheng)