W99681CF Datasheet, PDF (17/78 Pages) Winbond – JPEG USB Dual Mode Camera Chip

W99681CF
4.3 Power-on Reset Initialization
During power-on reset, states of the memory data lines MD[7:0] are latched into the W99681CF′s
internal configuration registers as device configuration information. Since each pin of MD[7:0] is
internally pulled up on its I/O buffer, no external pull-up resistor is required. For pull-down, a 4.7K ohm
resistor is recommended. Table 4.2 describes the power-on reset configuration definitions.
Table 4.2 Power-on Reset Configuration Definitions
MD Bit Value Definition
MD7
MD6
0 Normal operation
1 Force suspend mode if suspend mode is enabled
0 Suspend mode is disabled
1 Suspend mode is enabled
MD5
0 Isochronous handshake phase is enabled
1 Isochronous handshake phase is disabled
MD4
0 Internal RCV comes from SIE
1 Internal RCV comes from USB Transceiver
MD3
0 PLL Disable
1 PLL Enable
MD2
MD1
0 Low Power, Bus-powered Devices
1 High Power, Bus-powered Devices
0 EDO DRAM
1 SDRAM
MD0
0 256Kx DRAM
1 1Mx DRAM
Conf Reg
CR00_15
CR00_14
CR00_13
CR00_12
CR00_11
CR00_10
CR00_9
CR00_8
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Publication Release Date: March 2000
Revision A1