P90CL301BFH Datasheet, PDF (11/92 Pages) NXP Semiconductors – Low voltage 16-bit microcontroller

Philips Semiconductors
Low voltage 16-bit microcontroller
Preliminary specification
P90CL301BFH (C100)
Table 12 Bus size depending on BSIZE, CSBTX and BSn (n = 0 to 6)
PIN BSIZE BIT CSBTX
BUS SIZE OF CS0 TO CS6⁽¹⁾
BSn = 0
BSn = 1
BUS SIZE OF CSBTX
AT
BOOT
AFTER
BOOT
0
0
16 bit
8 bit
16
16
0
1
16 bit
8 bit
16
8
1
0
note 2
8 bit
8
8
1
1
16 bit
8 bit
8
16
PORT PL AVAILABLE
(P0 TO P7)
no
yes
yes
no
Notes
1. Depending on bit BSn in register BSREG.
2. The default value after reset of bits BSn in register BSREG is logic 0 which corresponds to 16-bit mode for CS0 to
CS6. In this case, it is recommended to set BSn to logic 1 in the boot routine. Afterwards if CSBTX is set to logic 1,
BSn can be reset to logic 0 by software for further transfers in 16-bit mode.
6.4 System Control Register (SYSCON)
The P90CL301BFH uses a System Control Register (SYSCON) for adjusting system parameters.
Table 13 System Control Register (address FFFF 8000H)
15 14 13
12
11
10
9
8
7⁽¹⁾
6⁽¹⁾
54
3
2 1⁽²⁾
0
WDSC BPE CSBTX STBY PCLK3 PCLK2 PDE GF PCLK1 PCLK0 IM WD FBC PD IDL DOFF
Notes
1. The default values after a CPU reset: PCLK1 = 1 and PCLK0 = 1; all other SYSCON bits are a logic 0.
2. All bits are reset by the RESET instruction, except the IDL bit which is only reset by a CPU reset.
1996 Dec 11
11