Table 3-8. Pbc Register; Table 3-9. Pbc Fields; Register Definitions - Sharp LH79524 User Manual

Boot Controller

3.2.2 Register Definitions

3.2.2.1 Power-up Boot Configuration Register (PBC)
Reading from the PBC register returns the value that the PC[7:4] pins were driven during
a power-on reset. This value is used by software contained in the Boot ROM, as well as
the Boot Controller, to determine the type and configuration of the external device from
which the CPU is to boot.
BIT
FIELD
RESET
RW
BIT
FIELD
RESET
RW
ADDR
BITS NAME
31:4
3:0
3-8
31 30 29 28 27
0 0 0 0 0
RO RO RO RO RO
15 14 13 12 11
0 0 0 0 0
RO RO RO RO RO
/// Reserved Reading returns 0. Write the reset value.
Power-up Boot Configuration This field contains the value that the PC[7:4]
PBC
pins were driven during power-on reset.

Table 3-8. PBC Register

26 25 24 23
///
0 0 0 0
RO RO RO RO
10 9 8 7
///
0 0 0 0
RO RO RO RO
0xFFFE6000 + 0x00

Table 3-9. PBC Fields

DESCRIPTION
Version 1.0
LH79524/LH79525 User's Guide
22 21 20 19 18
0 0 0 0 0
RO RO RO RO RO
6 5 4 3 2
0 0 0 PC[7:4]
RO RO RO RO RO
17 16
0 0
RO RO
1 0
PBC
RO RO