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SAB82525N Datasheet(PDF) 69 Page - Siemens Semiconductor Group |
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SAB82525N Datasheet(HTML) 69 Page - Siemens Semiconductor Group |
69 / 126 page ![]() Semiconductor Group 69 SAB 82525 SAB 82526 SAF 82525 SAF 82526 7 Operational Description 7.1 RESET The HSCX is forced into the reset state if a high signal is input to the RES pin for a minimum period of 1.8 µs. During RESET, the HSCX is temporarily in the power-up mode, and a subset of the registers is initialized with defined values. After RESET, the HSCX is in power down mode, and the following registers contain defined values: Table 7 RESET Values Register RESET Value Meaning CCR1 00H – power down mode serial port configuration; pt-pt, NRZ coding, transmit data pins are open drain outputs – clock mode 0 CCR2 00H RTS pin normal function – CTS and RFS interrupts disabled no data inversion MODE 00H auto-mode 1 byte address field external timer mode – receivers inactive RTS output controlled by HSCX, timer resolution: k = 32.768, no testloop STAR 48H XFIFO write enable receive line inactive no commands executing ISTA EXIR 00H – no interrupts masked CMDR 00H no commands XBCH RBCH 00H – interrupt controlled data transfer (DMA disabled) – full-duplex LAPB/LAPD operation of LAP controller – carrier detect auto start of receiver disabled XCCR RCCR 00H 1-bit time-slot |
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