Conexant Bt8960, Hardware User'S Manual

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Bt8960
Bt8960EVM Hardware User’s Guide
Bt8960EVM Hardware User’s Guide Interface Descriptions
100188B
Conexant
9
Conexant Proprietary and Confidential
80C32 Processor Circuitry
RESET
The RESET button provides an active-high reset signal to the 80C32 processor. The 80C32
processor contains an internal pull-down resistor so that an external pull-down resistor is not
needed. The length of the reset pulse is controlled with capacitor C34.
Memory
A 64 Kbyte PROM (27C512) provides program memory to the 80C32. The 80C32 contains 256
bytes of internal RAM. No external RAM is provided. The upper address line of the 80C32
processor (ADDR15) is used as chip select for the Bt8960 device. The memory is mapped
according to
Table 3 .
TP13 RING (circuit side)
TP14 GND
TP15 RDAT (buffered)
TP16 TCK (JTAG)
TP17 TMS (JTAG)
TP18 TDI (JTAG)
TP19 TDO (JTAG)
TP20 TBCLK
TP21 RBCLK
TP22 TQ0 (buffered)
TP23 +5V
TP24 QCLK (buffered)
TP25 TDAT (buffered)
Table 2 8960 Line Card Test Point
Test Point Name Signal Name
Table 3 Memory Mapping
Memory Type Address Range R/W Size (bytes) Description
Internal RAM 0x00–0xFF R/W 256 80C32 Internal Memory
Program 0x0000–0xFFFF R 64 K ROM
Data 0x0000–0x00FF R/W 256 Bt8960
Data 0x0100–0x7FFF - 32 K–256 Phantom Bt8960
Data 0x8000–0xFFFF - 32 K Unused