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CybraTech (2000) Ltd.
SOC-3000/i Scale-On-Chip
ASIC
Technical Specification
Revision B
Page 65
July, 2002
SPECIAL FUNCTION REGISTERS (SFR)
The SOC-3000/i includes Special Function Registers (SFR) that enable the device hardware
controllers and reset them. Each controller description details its specific SFR operation.
This section details all the SFR registers and functions. All these registers are mapped as
XDATA memory area.
Global Configuration Register
Register 0C100H is used as a general enable/disable of pin allocation to all the hardware
controllers in the SOC-3000/i. Upon power-up or reset this register is cleared, disabling all
the hardware controllers. Writing 0xFF to the register activates the allocation of pins to
hardware controller, as defined by programming the CFR registers.
TABLE 33: GLOBAL CFR REGISTER
ADDRESS
FUNCTION
REMARKS
C100H
Enable / Disable pin allocation
0x00 – Enable
0xFF - Disable
Operation
1. Upon power-up or reset, the Global CFR register is set, disabling all pin allocation to the
hardware controllers.
2. Initialize the CFR registers according to the required hardware configuration as described in
section “
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