SAA7348GP Datasheet, PDF (34/60 Pages) NXP Semiconductors – All Compact Disc Engine ACE

Philips Semiconductors
All Compact Disc Engine (ACE)
Preliminary specification
SAA7348GP
8.1.12 A SECOND SERIAL INTERFACE
A second serial interface is implemented using the
following registers:
• SCON2: 0XC0
• SBUF2: 0XC1.
This is of course an interrupt function. Bit 6 of the
IE register is used to enable this function. Bit 6 of the
IP register is used to define this interrupt to the highest
Table 27 Servo memory map
ADDRESS (HEX)
0X100
0X101
0X102
0X103
0X104
0X105
0X106
0X107
0X108
0X109
0X10A
0X10B
0X10C
0X10D
0X10E
0X10F
0X110
0X111
0X112
0X113
0X114
0X115
0X116
0X117
0X118
0X119
0X11A
0X11B
0X11C
0X11D
CONTENTS
time_keeper
focus_stat
rad_stat
mem_sledge1_hi
offtrack_hi_rb
offtrack_lo_rb
mem_sledge1_lo
rad_int_hi
rad_int_lo
rad_offset_hi
rad_error_gain_mem_hi
tpi_gain_hi
focus_error_mem
rad_error_mem
speed_hi
speed_lo
focus_int_hi
focus_int_lo
drop_out_code
foc_prop_mem
FOCUS_PROP_MULT
FOCUS_INT_GAIN
RAMP_MEAN_VALUE
slee_mult_mem
RAMP_HEIGTH
FE_LEVEL
timer1
acc_stat_mem
rad_prop_mult_mem
rad_error_acc_mem
priority level. The new vector address of the interrupt could
be 0033H.
8.1.13 MEMORY MAP ACCESS TO THE SERVO
Since the performance of a basic engine is largely
determined by the subcode retrieval speed, fast access to
the subcode buffer is desirable. The servo RAM is mapped
onto the AUX RAM of the microcontroller. In this way it is
possible to directly access the servo RAM registers; see
Table 27.
ADDRESS (HEX)
0X11E
0X11F
0X120
0X121
0X122
0X123
0X124
0X125
0X126
0X127
0X128
0X129
0X12A
0X12B
0X12C
0X12D
0X12E
0X12F
0X130
0X131
0X132
0X133
0X134
0X135
0X136
0X137
0X138
0X139
0x13A
0x13B
CONTENTS
rad_int_gain_mem
speed_mult_mem
rad_offset_lo
rad_error_gain_mem_lo
tpi_gain_lo
sp_mem_lo
sp_mem_hi
speed_setpoint
tpi_signal_mem
rad_ctrl_1_mem2
rad_ctrl_1_mem
rad_ctrl_2_mem
rad_gain_mem
stack 5
stack 4
stack 3
stack 2
stack 1
stack 0
oldcom
state_mult_mem
mem_sledge2_lo
mem_sledge2_h
RAMP_GAIN
slede_mult_mem2
FAST_SPEED
mem_sledge2_lo_lo
gain_filter2_mem_lo
gain_filter2_mem_hi
gain_filter1_mem
1997 Jul 11
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